Abstracts

The 28th Hiroshima International Symposium on
Synchrotron Radiation
Materials Science using VUV-SX Synchrotron Radiation
Towards the future HiSOR-II project

March 14- 15, 2024

Faculty Club, Hiroshima University
Hiroshima Synchrotron Radiation Center, Hiroshima University

Supported by
The Japanese Society for Synchrotron Radiation ResearchParticle Accelerator Society of JapanThe Physical Society of Japan

ProgramOral Session

DAY 1 ・Thursday, 14 March, 2024

Opening (Chairperson: T. Okuda)
09:30 - Greeting
10:05

Takeshi YAMAMOTO (Deputy Director, University Research Facilitation Division,

Research Promotion Bureau, Ministry of Education, Culture, Sports, Science andTechnology (MEXT), Japan)
Greeting
Atsushi SUGETA (Executive Vice President(Research), Executive Vice

President, Hiroshima University, Japan)
Overview of HiSOR Activities
Kenya SHIMADA (Director, Synchrotron Radiation Center, Hiroshima University,

Japan)
10:05 - Symposium Photo
10:30
10:30 - Coffee break
10:40

Oral Session 1 Spin ARPES (Chairperson: T. Okuda)
10:40 - Han Woong YEOM
11:15

(POSTEC, Korea)"Spin-resolved ARPES at Pohang Light Source and the future of Korean ARPES
activity based on synchrotron"

11:15 - Kouji MIYAMOTO
11:40"Spin-resolved photoelectron spectroscopy at HiSOR ~present status andfuture prospect~"

11:40 13:30(Hiroshima University, Japan)

LunchPoster Session (Chairperson: H. Sato)
13:30 14:30
14:30 16:20
16:20 16:30

Student Short Oral Session (1~2 min/each)

Poster Session

Coffee break

Oral Session 2 Soft x-ray magnetic circular dichroism of nanomaterials(Chairperson: X. Hou)
16:30 - Manuel VALVIDARES
17:05(ALBA Synchrotron Lighe Source, Spain)" ALBA Synchrotron radiation techniques for oxide, 2D-vdW and otherspintronic materials "17:05 - Naoyuki MAEJIMA
17:40(Institute for Molecular Science, Japan)"Magnetic and Electronic property of transition metal phosphides interface of
NixP/Fe2P"

17:40 - Xueyao HOU and Masahiro SAWADA
18:05(Hiroshima University, Japan)"Recent status of HiSOR BL-14 ~Magnetic interaction intermediated through amonatomic insulating layer, studied by XMCD experiment and computational
method~"Reception (Chairperson: M. Ibrahim)

18:15 - Welcome Reception
19:45

LA Bohème(Faculty Club)DAY 2 ・Friday, 15 March, 2024

Oral Session 3 High-resolution ARPES (Chairperson: K. Sumida)
09:00 - Daniel S DESSAU
09:35"Superconductivity and Flat Bands at the Fermi Level"

09:35 - Walid MALAEB
10:10(Colorado University, USA)

(Lebanese American University, Lebanon)"Annealing effects in topological alpha-Sn/InSb heterostructures revealed byphotoemission spectroscopy"

10:10 – Shin-ichiro IDETA
10:35

10:35 –
10:45

(Hiroshima University, Japan)"Recent Developments of ARPES Studies at HiSOR BL-1"

Coffee break

Oral Session 4 VUV-CD spectroscopy of biomolecules(Chairperson: M. Ibrahim)
10:45 - Frank WIEN
11:20

(SOLEIL, France)"SRCD/OCD at DISCO overview and highlights"

11:20 - Koichi MATSUO
11:45(Hiroshima University, Japan)"Recent Advancements in HiSOR-VUVCD Spectrophotometer for
Characterizing Biomolecule Structures"

11:45 11:55

Coffee break

Oral Session 5 Light source accelerators and insertion devices(Chairperson: Y. Lu)
11:55 - Shaukat KHAN
12:30

"DELTA - a university-based synchrotron light source"

12:30 - Masahiro KATOH
12:55(Technische Universitaet Dortmund, Germany)(Hiroshima University, Japan)"Compact synchrotron light source HiSOR - present status and future
prospects -"Closing Session (Chairperson: H. Namatame)
12:55 13:10

Awarding of Student Poster Prizes and Closing Ceremony
Closing Remarks

Oral Session

-Oral SessionO01

Spin-resolved ARPES at Pohang Light Source and the future of Korean
ARPES activity based on synchrotron
Han Woong Yeom
Center for Artificial Low Dimensional Electronic Systems,
Institute for Basic Science & Department of Physics, POSTECH

O02

Spin-resolved Photoelectron Spectroscopy at HiSOR~Present Status and Future Prospect~
Koji Miyamoto
Hiroshima Synchrotron Radiation Center (HiSOR), Hiroshima Univ., Japan

O03

ALBA Synchrotron radiation techniques for oxide, 2D-vdW and otherspintronic materials
Manuel VALVIDARESALBA Synchrotron Lighe Source, Spain

O04

Magnetic and Electronic property of transition metal phosphides interface of
NixP/Fe2P
Naoyuki Maejimaa,b,c, Yuma Kuwabaraa, Tomoya Yoshidaa, Takahiro Otaa,
Yuki Shimatoa and Kazuyuki Edamotoa,ba Coll. Sci., Rikkyo Univ., Japan.
b Research Center for Smart Molecules, Rikkyo Univ., Japan.
c Institute for Molecular Science, Japan.

O05

Recent status of HiSOR BL-14
Xueyao Hou and Masahiro Sawada
Hiroshima Synchrotron Radiation Center (HiSOR), Hiroshima Univ., Japan

O06

Superconductivity and Flat Bands at the Fermi Level
Dan Dessau
University of Colorado, USA

O07

Annealing Effects in Topological α-Sn/InSb Heterostructures Revealed by
Photoemission Spectroscopy
Walid Malaeba, Kohdai Inagakib, Masaaki Tanakab,c, Le Duc Anhb,c and
Masaki Kobayashib,ca Department of Natural Sciences, Lebanese American University, Lebanon
b Department of Electrical Engineering and Information Systems, The University of Tokyo,
Japan
c Center for Spintronics Research Network (CSRN), The University of Tokyo, Japan

O08

Recent Developments of ARPES Studies at HiSOR BL-1
Shin-ichiro Idetaa,b, Masashi Aritab, Shiv Kumarc, Yudai Miyaia,
Yogendra Kumara, Amit Kumard, Kenya Shimadaa,ba Graduate School of Advanced Science and Engineering, Hiroshima Univ., Japanb Hiroshima Synchrotron Radiation Center (HiSOR), Hiroshima Univ., Japanc Institute of Microelectronics (IME), Agency for Science, Technology and Research,
Singapored Max Planck Institute of Molecular Plant Physiology, Germany

O09

SRCD/OCD at DISCO overview and highlights
Frank WIENSOLEIL, France

O10

RecentAdvancements

in

HiSOR-VUVCD

Spectrophotometer

Characterizing Biomolecule Structures
Koichi Matsuo & Mohamed Ibrahim
Hiroshima Synchrotron Radiation Center (HiSOR), Hiroshima Univ., JapanO11

DELTA - a university-based synchrotron light source
Shaukat Khan
Center for Synchrotron Radiation (DELTA) and Department of Physics,
TU Dortmund University, Germany

O12Compact synchrotron light source HiSOR- Present status and future prospects Masahiro Katoh
Hiroshima Synchrotron Radiation Center (HiSOR), Hiroshima Univ., Japan

for

O01

Spin-resolved ARPES at Pohang Light Source and the futureof Korean ARPES activity based on synchrotron
Han Woong Yeom
Center for Artificial Low Dimensional Electronic Systems, Institute for Basic Science& Department of Physics, POSTECH
email : yeom@postech.ac.kr
In this talk, we review the construction and the activity of the spin-resolved ARPES
endstation in Pohang Light Source (PLS) and the future plan of the ARPES beamline in Korea’s
new synchrotron radiation source under construction. The spin-resolved ARPES endstation wasplanned in 2013 by the Center for Artificial Low Dimensional Electronic Systems of the Institue
for Basic Science as an addition to the PLS’s only one ARPES beamline (BL-4A) following the
upgrade of PLS into PLS-II (3 GeV 250 mA top-up operation with 6 nmrad vertical emittance) in2010. It involved the installation of an elliptically polarized undulator in 2015 and theconstruction of an ARPES facility based on a DA-30 Scienta analyzer in 2016. Since then, thesystem has been actively used by Korean ARPES groups. The attachment of a VLEED-type spin
detector was progressed during 2018-2021 in collaboration with the HiSOR group. The
characteristics of the system will be introduced with a few recent highlighted works such as thedetection of photoelectrons from spontaneously formed excitions of an excitonic insulator [1, 2]
and the in-situ-controlled quantum phase transitions of a 2D Mott insulator [3]. On the other hand,
Korea started to build a 4th generation synchrotron radiation source (3 GeV 400 mA with 60
pmrad vertical emittance) at Ochang in 2022, which will host a nano-ARPES beamline as one ofits first batch beamlines. This plan will be introduced briefly.
References:[1] K. Fukutani, R. Staina, C. I. Kwon, J. S. Kim, K. J. Kong, J. Kim, and H. W. Yeom, Nature
Physics 17, 1024 (2021).
[2] K. Fukutani, R. Staina, J. Jung, E. F. Schwier, K. Shimada, C. I. Kwon, J. S. Kim, and H. W.
Yeom, Phys. Rev. Lett. 123, 206401 (2019).
[3] J. Jung, K.-H. Jin, J. Kim, and H. W. Yeom, Nano Lett. 23, 8029 (2023).

O02
BL-9B

Spin-resolved Photoelectron Spectroscopy at HiSOR~Present Status and Future Prospect~
Koji Miyamotoaa

Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagamiyama, Higashi-Hiroshima,739-0046, Japan

Keywords: SARPES, Spin dependent electronic structure, Topological insulator

Our developed spin- and angle-resolved photoemission apparatus (SARPES) equipped with two
high-efficiency VLEED-type spin detectors is installed at the branch beamline BL-9B of the
APPLE-II undulator in 2013[1]. The double highly efficient spin detector is installed in a 90-degree
configuration to enable direct observation of three-dimensional spin orientation. Up to now,
through joint research and our own research, we have clarified the peculiar spin-dependent
electronic structure of various materials (topological materials, Rashba materials, and magnetic
materials etc.) using our SARPES and elucidated the properties of materials from their electronic
structure.
Recently, three new improvements were done in our apparatus at BL-9B. Firstly, a ellipticalfocusing mirror is installed, to improve the large beam size (3000(H)x500(V) μm). As a consequent,
the beam size has been reduced to 500(H)x100(V)μm, i.e., one-sixth smaller than previous one.
Secondly, the two slits and diffraction gratings in our beamline, which were operated manually, cannow be changed automatically by installing a stepping motor. This has transformed the system intoa more user-friendly one. Thirdly, toward the operando measurement, we developed themanipulator with eight electrodes that can contact the electrodes on a special sample holder.
In this presentation, we will briefly report on the current status of SARPES at BL-9B and theobtained experimental results for the period 2018-2023. In addition to the BL-9B instrument, we
will also report on the status of the μ-laser-SARPES instrument that was recently successfully
developed[2]. Future prospects for these instruments will also be presented.

REFERENCES
1. T. Okuda et al., J. Electron. Spectrosc. Relat. Phenom. 201, 53-59 (2015).
2. T. Iwata, Sci. Rep. 14, 127 (2024).

O03

ALBA Synchrotron radiation techniques for oxide, 2DvdW and other spintronic materials
Manuel Valvidaresaa

ALBA Synchrotron Light Source, Cerdanyola del Vallès, 08290 Barcelona, Spain

The talk will cover capabilities at ALBA synchrotron for investigating current aspects onoxide, bidimensional van der Waals materials and other spintronic relevant materials. First, aquick overview of ALBA and the Electronic and Magnetic structure of matter section will begiven, including details of its core beamlines and instruments: the X-ray Photoemission
Electron Microscope (X-PEEM) at CIRCE beamline[1], the X-ray Absorption Spectroscopy
and Magnetic Circular Dichroism (XMCD) cryomagnet and the multipurpose reflectometerfor soft x-ray resonant and coherent scattering (RSXS, XRMS, GISAXS, Holography/CDI) at
BOREAS beamline[2], and the more recent soft X-Ray angle-resolved photoemission
electron spectroscopy (ARPES) instrument at LOREA beamline [3]. On a second part, recent
highlights on the investigation of spintronic and quantum materials will be shown, and recent
and on-going instrumental developments will be quickly presented.

FIGURE 1. Core instruments of the electronic and magnetic structure section of the ALBA synchrotron: (lefttop) PEEM microscope endstation; (left bottom) view of ARPES instrument and LOREA beamline; (mid)
XMCD endstation and off-line surface science instrumentation and glove box; (right) SXRS endstation

REFERENCES
1. A. Barla, et al, Design and performance of BOREAS, the beamline for resonant X-ray absorption
and scattering experiments at the ALBA synchrotron light source, Journal of Synchrotron
Radiation 23,1507-1517 (2016)
2. L. Aballe, et al. The ALBA spectroscopic LEEM-PEEM experimental station: Layout andperformance. J. Synchrotron Rad. 22, 745-752 (2015)
3. M. Tallarida et al. LOREA, the ARPES beamline at ALBA synchrotron (under preparation)

O04

Magnetic and Electronic property of transition metal
phosphides interface of NixP/Fe2P
Naoyuki Maejimaa,b,c, Yuma Kuwabaraa, Tomoya Yoshidaa, Takahiro Otaa,
Yuki Shimatoa and Kazuyuki Edamotoa,babColl. Sci., Rikkyo Univ., Tokyo 171-8501, Japan.
Research Center for Smart Molecules, Rikkyo Univ.,Tokyio 171-8501, Japan.
cInstitute for Molecular Science, Okazaki 444-8585, Japan.

Transition metal Phosphide with Fe2P-type structure is promising candidates for magnetic
refrigerant materials.[1] (Fe1-xNix)2P exhibit ferromagnetic properties at room temperature forx < 0.8. The Curie temperature decreases with increasing x and it exhibit a Pauli paramagnet
behavior for x>0.5. [2] The Curie temperature can be controlled by adjusting the ratio of Fe
and Ni. Additionally, experimental and computational studies suggest that the magnetism of(Fe1-xNix)2P involves mainly the Fe sites and little or no Ni sites. [3] The change in themagnetic properties is consider to involve a change in electronic state due to the Fe and Ni
substitution. However, there are few experimental investigations of magnetic properties andelectronic states about the same system.
Recently, we have succeeded in fabricating Ni phosphide thin films on Fe2P substrates. In
generally, surfaces and interfaces often exhibit different magnetic properties from those in thebulk. It is interesting that the new magnetic properties will appear or not in this transition
metal phosphide thin film and interface, however there is few reports about the magnetic
properties of this kind of materials. In this study, we investigated the magnetic and electronic
properties of the thin films and interfaces of NixP/Fe2P samples using X-ray magnetic circulardichroism (XMCD) and X-ray photoelectron spectroscopy (XPS) measurements.
Fe2P(10-10) were cleaned by cycles of Ar+ ion spattering (0.5 keV) and 750°C annealing.
The cleaned surfaces showed c(2x2) Low energy electron diffraction (LEED) patterns. Ni
atoms were deposited on the Fe2P clean surface at 500°C, which induces phosphorization of
the film owing to surface segregation of P atoms from the bulk.[4] The thickness of thin film
was controlled by amount of Ni. Prepared NixP/Fe2P samples exhibit c(2x2) LEED pattern.
The XMCD measurement of Fe2P(10-10) and Ni2P(10-10) clean surfaces and NixP/Fe2P thinfilm samples were performed at BL14 of HiSOR at room temperature. The XPS measurementof those samples were performed at BL5U of UVSOR and BL3B of PF.
Firstly, we measured Fe L edge and Ni L edge XMCD spectra of the NixP/Fe2P sample.
The thickness of nickel phosphide layer was estimated 5Å. The Fe Ledge XMCD signal
obtained from the NixP/Fe2P sample was significantly increased from that of clean Fe2P
substrate sample. Ni phosphides such as Ni2P, Ni3P, and NiP3 are paramagnetic,[5] and Ni2P
substrates did not show XMCD signals. On the other hand, NixP/Fe2P samples showed
XMCD signals at the Ni L edge. The peak top energy of the Fe L3 edge of the thin film
sample is lower than that of the Fe2P clean surface and the peak top energy of the Ni L3 edgeof the thin film sample is higher than that of Ni2P clean surface.
Secondly, we measured Fe L edge XMCD spectra obtained from various thickness
NixP/Fe2P samples as shown in Figure1. Thickness dependence of XMCD signal was
confirmed. These results indicated that the interaction between the thin film and the substratechanged the Curie temperature of the substrate and magnetic property of Ni phosphide thinfilm.

Combining XMCD and XPS results, we will discuss about this relationship of magnetic
and electronic properties NixP/Fe2P samples.

FIGURE 1. Fe L edge XMCD spectra obtained from various thickness NixP/Fe2P samples.

REFERENCES[1] O. Tegus, E. Brück, K. H. J. Buschow, F. R. de Boer, Nature 415 (2002) 150.
[2] J. B. Goodenough et al., J. Appl. Phys. 40 (1969) 3.
[3] R.Zachnetal et al., J. Alloys Compd. 383 (2004) 325[4] Y. Sugizaki et al., Jpn. J. Appl. Phys. 57 (2018) 115701.
[5] K. Zeppenfiled et al., J. Phys. Chem. Solids 54, (1993) 1527.

O05

Recent status of HiSOR BL-14
Magnetic interaction intermediated through a monatomic insulating layer,
studied by XMCD experiment and computational method
Xueyao Hou and Masahiro Sawada
Hiroshima Synchrotron Radiation Center, Hiroshima University,
2-313 Kagamiyama, Higashi-Hiroshima, 739-0046, JapanHiSOR-BL14 is a soft X-ray beamline whose energy range is between 400 and 1200 eV,
aimed at X-ray absorption spectroscopy and related dichroic experiments for transition metals
and their compounds [1, 2]. In recent several years, we have especially devoted our activity
to X-ray magnetic circular dichroism (XMCD) experiment, which is a powerful tool to study
magnetic properties and to analyze the local magnetic moment element-specifically formagnetic layers grown on single crystal surfaces. To extract the intrinsic nature of magnetism
without influence of oxidation or surface contamination, we have constructed an in-situ
experiment system at HiSOR-BL14, where all experiments of a sample fabrication,
characterization and XMCD measurements can be conducted under ultra-high vacuum(UHV) at the same time [3].
Magnetic tunnel junction (MTJ) is one of important magnetic layered structures related todevice applications. Epitaxial MTJ with well-ordered interfaces shows high-performance intunneling magnetic resistance (TMR) effect, since coherent tunneling between the magnetic
electrode layers is realized with keeping orbital symmetry of the wave function of thetunneling electron. Epitaxial MTJ with an ultrathin burrier layer is a good solution compatible
with both high-MR-ratio and high-speed-access, ensured by impedance low enough against
minimized cross section in highly integrated TMR memory cell. Hexagonal boron nitride (hBN) is one of ideal monolayers as candidate for the ultrathin burrier layer in TMR devices.
Essentially, magnetic state at the MTJ interface affects device performance in the TMR
memory cell, and besides, interlayer magnetic interaction is crucial in the control of memory
bit and exchange bias effect. We have focused on the interfacial and interlayer magnetic
properties in the monatomic layers of Co/h-BN/Ni(111), Fe/h-BN/Ni(111) [4], and FeMn/hBN/Ni(111), using our in-situ XMCD system. In all the cases, antiferromagnetic (AFM)
coupling between both sides of magnetic layers were found through the monolayer of h-BN,
and the AFM coupling energies were depending on magnetic elements of the top layer.
The electronic structure calculation is a powerful tool to know microscopic origin of
specific magnetic and electronic properties emerge in artificial layers and interfaces [5]. We
have adopted first principle calculation (VASP) for a realistic slab model corresponding to
the ultrathin TMR structure of Co/h-BN/Ni(111). The computational analysis shows amagnetic interaction chain of spin-polarized bonding orbital plays essential role in the AFM
coupling through a monatomic layer of h-BN.
REFERENCES
1. M. Sawada et al., AIP conference proceedings. 879, 551 (2007).
2. M. Sawada et al., AIP conference proceedings. 1234, 939 (2010).
3. T. Ueno et al., Rev. Sci. Instrum. 83, 123903 (2012).
4. W. Tadano et al., J. Elect. Spect. Relat. Phenom. 220, 105 (2017).
5. X. Hou et al., Appl. Surf. Sci. 594, 153416 (2022).

O06

Superconductivity and Flat Bands at the Fermi Level
Dan Dessau
University of Colorado, Boulder, Colorado, 80309, USA
Dessau@Colorado.edu

I discuss a few interesting superconductors with either very flat bands at the Fermi level orsuspected flat bands at the Fermi level, with measurements from high resolution ARPES. I
will focus on the case YFe2Ge2 that we showed has very heavy bands (meff∼25me) within∼10meV of the Fermi level, which is extremely high for a non-f electron system [1]. I will
discuss the origins and implications of such flat bands in these and other materials.

FIGURE 1. Very flat bands at EF in the anomalous superconductor YFe2Ge2.

REFERENCES
1. R. Kurleto, D.S. Dessau et al., “Flat Bands at the Fermi Level in Unconventional Superconductor
YFe2Ge2” arXiv:2311.09492 (2023)

O07

Annealing Effects in Topological -Sn/InSb
Heterostructures Revealed by Photoemission Spectroscopy
Walid Malaeba, Kohdai Inagakib, Masaaki Tanakab,c, Le Duc Anhb,c and
Masaki Kobayashib,caDepartment of Natural Sciences, Lebanese American University, 1102‑2801 Beirut, Lebanon
Department of Electrical Engineering and Information Systems, The University of Tokyo, 7-3-1
Hongo, Bunkyo-ku, Tokyo 113-8656, Japanc
Center for Spintronics Research Network (CSRN), The University of Tokyo, 7-3-1 Hongo,
Bunkyo-ku, Tokyo 113-8656, Japanb

There has been much interest recently in exploring the electronic structure of novel
topological materials due to their exotic underlying physics and great potential for
applications. In particular, -Sn has gained much attention due to its simple elemental
structure, non-toxic nature and the diverse tunable topological phases it can reveal ranging
from a topological insulator (TI) to a topological Dirac semimetal (TDS) depending on theapplied strain [1]. Angle-resolved photoemission spectroscopy (ARPES) has uncovered
various aspects of the electronic structure of -Sn including the predicted linear bands andDirac cones [2]. However, there is an urging need to explore the stability of this compound
under various conditions which is an important requirement for successful use in applications
especially in spintronic devices.
In this talk, we will mainly discuss about the annealing effects on the electronic structureof -Sn/InSb heterostructures as revealed by x-ray photoemission spectroscopy (XPS).
Interestingly, our XPS results demonstrate the thermal stability of -Sn thin films over InSb
substrates up to 350 °C. By studying both core-level and valence-band spectra, it was
concluded that no dramatic evaporation and no  to  phase transition has occurred in the Sn thin films. This presents robust evidence for the reliability of using this compound in
devices up to high temperatures.
We will also present an overview on our previous work and our future perspectives forusing HiSOR for high-resolution ARPES studies on high-Tc superconductors and other novel
materials.
REFERENCES
1. L. D. Anh et al., Adv. Mater., 33, 2021, pp. 2104645.
2. K. H. M. Chen et al., Phys. Rev. B, 105, 2022, pp. 075109.

O08

BL-1

Recent Developments of ARPES Studies at HiSOR BL-1
Shin-ichiro Idetaa,b, Masashi Aritab, Shiv Kumarc, Yudai Miyaia,
Yogendra Kumara, Amit Kumard, Kenya Shimadaa,baGraduate School of Advanced Science and Engineering, Hiroshima Univ.,
Higashi-Hiroshima 739-0046, Japanb
Hiroshima Synchrotron Radiation Center (HiSOR), Hiroshima Univ.,
Higashi-Hiroshima 739-0046, Japanc
Institute of Microelectronics (IME), Agency for Science, Technology and Research, 138632, Singapored
Max Planck Institute of Molecular Plant Physiology,
Am Mühlenberg 114476 Potsdam Brandenburg, Germany
Keywords: Angle-resolved photoemission, electronic structure, synchrotron radiation, laser

The Hiroshima Synchrotron Radiation Center (HiSOR) is the synchrotron radiation facility establishedat Hiroshima University. A compact 700 MeV electron-storage ring produces synchrotron radiation in theultraviolet (VUV) and soft x-ray range. Tunable photon energy in this range is indispensable and valuable
for studying the fine electronic structures of novel materials such as superconductors, topological insulators,
and Weyl semimetals etc., employing high-resolution angle-resolved photoemission spectroscopy (APRES).
Recently, to perform surface mapping in synchrotron radiation, based on the research and developments,
we have reduced the beam size of the synchrotron radiation by using a focusing mirror and to perform
detailed measurements by improving the accuracy of the manipulator system. In BL-1 (high-resolution
ARPES beamline), the beam size of the synchrotron radiation is reduced by order of magnitude (beam size:~50-60 μm). In addition, we have installed new analyzers for the beamline of BL-1 to realize fast Fermi
surface mapping. In near future, we install the laser ARPES system at the endstation of BL-1 and will opensoon.
In this presentation, we will show the details of recent developments in HiSOR beamline (BL-1) towards
the HiSOR-II projects.

O09

SRCD/OCD at DISCO overview and highlightsaFrank Wiena

Synchrotron SOLEIL, DISCO Beamline, L'Orme des Merisiers, Départementale 128, 91190 Saint-Aubin,
FRANCE

Synchrotron Radiation Circular Dichroism and Orientated Circular Dichorism
spectroscopy at DISCO beamline (Synchrotron SOLEIL) measures the differential
absorption of circular right and left polarized light in the Ultra-Violet range by chiralmolecules, like nucleic acids and proteins for instance. In the spectral range between 7 and 4eV, electronic transitions (n-π*, π -π* and charge transfer) are at the origin of the UV-lightabsorption. Characteristic absorption bands of circular (right or left) polarized UV light allow
to distinguish different types of folding of these complex biological macromolecules. Their
spatial arrangement correlates with the CD spectra and ultimately aids to determine thefolding of proteins, nucleic acids and their complexes.
For the past two decades biologists have collected, deposited and screened CD spectra
obtained from proteins (Ref. PCDDB) permitting them to successfully determine secondary
structure content (alpha helices, beta sheets and random coils) for amyloids, membraneproteins and protein-protein complexes notably. Reference (Ref. BeStSel)
For Nucleic acids, scientists have published spectra dating back as far as the late 50’s. Our
first goal has been achieved now by systematically digitalizing nucleic acid CD spectra fromthe literature. In addition, data collected recently at the DISCO beamline at SOLEIL
Synchrotron have been added including hundreds of Synchrotron Radiation Circular
Dichroism (SRCD) spectra. All these spectra have now been deposited in a public repository(Ref. NACDDB), which archives and freely distributes the experimental data including
metadata (sample conditions like pH, salinity and temperature), structural models and links tothe corresponding references, extending the CD spectroscopy and structure information
publicly accessible through the internet in contrast to time consuming literature research andvisual comparison. It is our aim to create an algorithm allowing to determine the folding of
nucleic acids (RNA and DNA) similar to BeStSel for proteins.
PCDDB:BeStSel:
NACDDB:

Ramalli SG et al. J Mol Biol 167441 (2022)

Micsonai A et al. Nucleic Acids Res. gkac345 (2022)

Cappannini A, et al. Nucleic Acids Res. gkac829 (2023)

O10

Recent Advancements in HiSOR-VUVCD
Spectrophotometer for Characterizing Biomolecule
Structures
Koichi Matsuo & Mohamed Ibrahim
Hiroshima Synchrotron Radiation Center, 2-313 Kagamiyama, Higashi-Hiroshima,
Hiroshima, 739-0046, Japan
Circular dichroism (CD), which refers to the difference in absorbance between left- and right-circularly
polarized light, is a well-established technique for monitoring the steric structures of chiral molecules,
particularly biomolecules (e.g., natural products, proteins, DNA, and polysaccharides). The usage ofsynchrotron radiation (SR) as a light source has further enhanced the usefulness of this spectroscopic
method. This enhancement includes extending the wavelength range of CD spectra into vacuum-ultraviolet(VUV) region (down to 140 nm) [1, 2], developments of new VUV-CD analytical methods combined withcomputational science, and the installation of the linear dichroism (LD) and spatial- and time-resolved
measurement systems. In this study, we introduce the recent progress in VUVCD techniques using SR in
HiSOR for characterizing the structures of biomolecules.
The relationship between chromophores of steric configurations and their substituents in organic
compounds or natural products can be analyzed based on the sign of CD (positive or negative). For
instance, the absorption of allene occurred around 180 nm, and the absolute configuration of its
substituents was determined from the CD sign in the VUV region [3]. Similarly, acetal bonds and hydroxyl
groups of sugars also exhibited CD peaks around 170 nm. However, determining configurations from theCD sign was a challenge, as even mono-saccharides exist in an equilibrium state composed of six isomers.
While molecular dynamics simulation and time-dependent density functional theory have successfully
reproduced the unique CD of each isomer, disclosing their steric configurations including intra- and intermolecular hydrogen bonding network [4].
The CD analysis of globular proteins combined with bioinformatics and LD enables estimating of thecontents, numbers of segments, sequences, and orientations of secondary structures of proteins. This
combination method was applied to elucidate the mechanism of protein-membrane interaction related todrug transportation into cell, myelin formation around neuron cells, and antimicrobial activity in immune
system [5,6,7]. Further, the time-resolved system installed into the CD instrument realized the kinetics
analysis of conformational changes of protein during membrane interaction processes. The use of micro
beam with Schwarzschild objective or lenses enables CD measurement of microvolume rare sample andposition-dependent CD. This system facilitated elucidating the mechanism of DNA damage response in Xray irradiated human HeLa cells [8] as well as measuring the spatial-resolved CD of liquid and solid
samples.
VUVCD analysis was extended to investigate the structuration of microbial exopolysaccharides (EPS)
sourced from the marine environment, along with biocompatible polymers (i.e., bioplastics) synthesized bybacteria. Structural variations due to sample sources, concentrations, and pH levels, as well as theircompatibility with cell membranes, were examined to compare their distinct biological functions, such as
proinflammatory activity [9,10].
The CD technique with SR light source would further enhance the performance of chiral spectroscopy
and open a pathway of next-generation of molecular chirality research.
References:[1] K. Matsuo, K. Gekko, Bull. Chem. Soc. Jpn., 6, 675 (2013); [2] K. Matsuo, K. Gekko, Meth. Mol. Biol., 2003, 253(2019); [3] T. Umezawa, N. Mizutani, K. Matsuo, Y. Tokunaga, F. Matsuda, T. Nehira, Molecules, 26, 1296 (2021); [4] K.
Matsuo, K. Gekko, J. Phys. Chem. A, 124, 642 (2020); [5] K. Matsuo, M. Kumashiro, K. Gekko, Chirality, 32, 594 (2020)[6] M. Kumashiro, Y. Izumi, K. Matsuo, Proteins, 89, 1251 (2021); [7] M. Kumashiro, R. Tsuji, S. Suenaga, K. Matsuo,
Membranes, 12, 131 (2022); [8] Y. Izumi, K. Matsuo, A. Yokoya, Chirality, 35, 165 (2023); [9]Y. ElHalmouch, H.A.H. Ibrahim, N.M. Dofdaa, M.E.M. Mabrouk, M.M.
ElMetwally, T. Nehira,K. Ferji, Y. Ishihara,
K. Matsuo, M.I.A. Ibrahim, Carbohydr. Polym., 311, 120743 (2023); [10] M.E. Esmael, M.I.A. Ibrahim, S.A.
Aldhumri, R.A. Bayoumi, K. Matsuo, A.M. Khattab, Int. J. Biol. Macromol., 242, 124721 (2023).

O11

DELTA - a university-based synchrotron light source
Shaukat Khan
Center for Synchrotron Radiation (DELTA) and Department of Physics
TU Dortmund University, Maria-Goeppert-Mayer-Str. 2, 44227 Dortmund, Germany
shaukat.khan@tu-dortmund.de

DELTA is a 1.5-GeV synchrotron radiation source operated by the TU Dortmund University
in Germany. As a university-based facility with emphasis on research and education, it offersa high degree of flexibility for user experiments and a relatively large amount of beamtime foraccelerator studies. The beamlines with short-wavelength radiation from a superconducting 7T wiggler are regularly overbooked. The talk will give an overview of the light source andthen concentrate on accelerator physics activities. Since 2011, the interaction of femtosecond
laser pulses with the electron beam is being investigated in view of generating ultrashortradiation pulses in the vacuum-ultraviolet regime as well as the coherent emission of terahertz
pulses [1]. Recently, an electromagnetic undulator was reconfigured to demonstrate the echoenabled harmonic generation (EEHG) scheme, where a twofold laser-electron interaction is
employed to reach shorter wavelengths [2]. This worldwide first EEHG implementation at astorage ring is not intended to be a user facility but will explore the feasibility and limitationsof this novel scheme with a compact setup [3]. Yet another recent activity is the study ofsynchrotron photons from a single electron in the storage ring.

References[1] S. Khan et al., Synchrotron Radiation News 24:5, 18 (2011).
[2] G. Stupakov, Physical Review Letters 102, 074801 (2009).
[3] S. Khan et al., Proc. of the Int. Part. Accel. Conference, Venice/Italy, 1057 (2023).

O12

Compact synchrotron light source HiSOR- Present status and future prospects Masahiro Katohaa

Hiroshima Synchrotron Radiation Center, Hiroshima University, 2-313 Kagami-yama, Higashi-hiroshima
739-0046, Japan

Keywords: Synchrotron, Accelerator, Electron.

The light source accelerator system at the Hiroshima Synchrotron Radiation Center (HSRC) consists ofa 150 MeV injector microtron, a beam transport line, and a racetrack type storage ring. This system is called
HiSOR (Hiroshima Synchrotron Orbital Radiation). The circumference of this ring is 22 m, and the bending
radius is 0.87 m in the normal conducting bending magnet with high magnetic field of 2.7 T. Stored electron
beam energy is 700 MeV, and synchrotron radiation having the critical energy of 873 eV from two 180degree bending magnets can be extracted through 14 photon beam ports. There are two straight sections in
the ring and two undulators are installed there. One is a linear undulator (2.4 m long, 57 mm period. Anotheris the variable polarization undulator (1.8 m long, 78 mm period). They provide high brightness VUVradiation to the photoelectron spectroscopy beam-lines.
HiSOR has been successfully operated since 1996. Operation hours exceed 2,000 hours in each year, andusers’ operation hours are about 1,600 hours. The machine is running 11 hours a day (with 2 injections) and4 days a week. Monday is reserved for machine tunings, machine studies and maintenances. The machine
startup in the morning takes 30 minutes. It is almost possible to make a turn-key operation for normal use.
The beam is about 300mA just after the energy ramping and about almost a half just before the re-injection.
Although the 24-hour operation has been requested from users, it is difficult to realize it due to the lack of
manpower.
In the early 2010s, we had a significant issue regarding the leakage of cooling water from the synchrotron
radiation absorbers into the ultra-high vacuum chamber in the dipole magnets. Unfortunately, this issue hasrecurred this year, approximately 10 years later. The absorber was temporally repaired to recover theaccelerator as soon as possible. It should be replaced with new one, whose mechanical design would bereconsidered, in the nearest future.
We evaluated the necessity and urgency of the aging-related issues of the accelerator components, andhave been replacing those one by one. We are currently promoting the replacement of the pulsed
electromagnet power supply for beam injection, which would utilize semiconductor devises instead of athyratron for the switching element. The replacement would be in the summer of 2025.
The control systems of the undulators are being upgraded. In FY2023, it was improved within the existing
accelerator control system framework, so that they can be controlled from the beam-line control system.
However, the response speed is not sufficiently high as requested from the users. In addition, the accuracyof the closed orbit correction is not sufficiently high and the experiments in the other beam-lines are
perturbed by the undulator gap changes. To address these, we are going to install a totally new control system
which is equivalent to that used in UVSOR.
Since the upgrade of the present HiSOR storage ring is not realistic because it is designed so compact
and has no redundancy to introduce new ideas or apparatus. Therefore, for the future plan, a new storage
ring HiSOR-2 has been designed. We are preparing several plans to flexibly adapt to the situations of thesynchrotron radiation science in our country and also of Hiroshima university. The beam energy of HiSOR2 would be 500 MeV, which is appropriate to produce high brightness VUV radiation with a compact ring.
We have designed a ring with a circumference of approximately 50m but also are designing a more compact
one with a circumference below 40m. Although construction of a full energy injector is included in the plan,
we are also considering usage of the current HiSOR storage ring as a full-energy injector for HiSOR-2.
To prepare for future plans, we are conducting researches on new accelerator technologies, such as new
injection scheme using pulse multipole magnets, accelerator control by machine learning and permanent-electric hybrid magnets. These development researches are being conducted in the collaboration with KEKPF, UVSOR, and Nagoya University. This year, the accelerator groups of KEK-PF, UVSOR, Nagoya
University and HiSOR have initiated regular monthly information exchange meetings. The collaboration
aims not only to advance joint developments of new technologies but also standardization of accelerator
components and maintenance parts, all of which would be effective in the reductions of the cost and the
manpower for operating and maintaining the present machine and for developing the future accelerators.
HiSOR-2 would be almost diffraction-limited VUV source. We continue researches on developing new lightsource technologies in collaboration with UVSOR. The graduate and undergraduate students join theseresearches. Some of them are conducted under the support of KEK's Accelerator Science International
Education Program (IINAS-NX).

REFERENCES
1. S. Matsuba, K. Shimada, M. Katoh, K. Kawase, K. Harada, J. Phys.: Conf. Ser. 1350 012015-1-5, 2019

The order of flash poster session
Thursday, 14 March, 2024

13:30 - 14:30

The flash talk is about 1～2 min/person.
P02S

Experimental Study on Single Electron Storage
Presenter: Y. Asai (Hiroshima University)
Unexpected two-fold symmetry of the electronic structure in heavily

P04S

overdoped Bi2201 observed by angle-resolved photoemission spectroscopy
Presenter: Y. Miyai (Hiroshima University)
Comprehensive Studies of the Electronic Structure for the Double-layer

P05S

high-Tc Superconductor Bi2Sr2CaCuO8+ δ- Revisit of the Phase Diagram by ARPES
Presenter: Y. Tsubota (Hiroshima University)
Probing the Electronic Band Structure of Altermagnetic MnTe: An ARPES

P06S

Study
Presenter: Kazi Golam Martuz ( Hiroshima University )Effects of Quantum Charge Fluctuations on the Electron Self-energy of

P07S

High–Tc Cuprate Superconductors Using Angle-Resolved Photoemission andInverse Photoemission Spectroscopies
Presenter: Y. Onishi (Hiroshima University)
Observation of Topological Surface States and Non-symmorphic Band

P08S

Degeneracy in Superconducting PdSeTe Single-crystal
Presenter: Y. Kumar (Hiroshima University)
Strain-Induced Relocation of Topological Surface States in Bi2Se3 Single

P09S

CrystalPresenter: Y. Kumar (Hiroshima University)
Research of Charge Fluctuations in the Electron-doped High-Tc Cuprate

P10S

NCCO Revealed by ARPES and IPES
Presenter: H. Yamaguchi (Hiroshima University)

P15S

Fermi surface of chiral magnet Yb(Ni1-xCux)3Al9 observed by ARPES
Presenter: Y. Tanimotoa (Hiroshima University)
Preparation of Pt Thin Film on MgO (001) and Observation of Its Electronic

P17S

Structure
Presenter: T. Asano (Hiroshima University)

P18S
P19S

Attempt to Control the Anisotropy of Topological Surface States
Presenter: R. Yamamoto (Hiroshima University)
Spin-polarized electronic states of FeCo thin film on Rh(001) substrate
Presenter: K. Kunitomo (Hiroshima University)
Demonstration of phase-resolved spin-ARPES on topological surface states in

P21S

Bi2Te3Presenter: T. Kousa (Hiroshima University)
Performance of laser-based SARPES with micrometer spatial and vector spin

P22S

resolution at HiSOR
Presenter: T. Iwata (Hiroshima University)
Monitoring the Self-Assembly of Alginate Hydrogel Using Synchrotron Radiation

P26S

Circular Dichroism
Presenter: T. Haga (Hiroshima University)
VUVCD Measurements of dried proteins and its application to protein-

P27S

membrane interaction study
Presenter: K. Hayashi (Hiroshima University)

P29S

Molecular orientation in polymer/fullerene blend films studied by NEXAFS
Presenter: Y. Hanaki (Hiroshima University)
Charge Transfer in Gold Substrates and Nanoparticles Coated with Methyl

P30S

Ester Substituted Aromatic Thiol Molecules
Presenter: S. Tendo (Hiroshima University)

Poster Session

-Poster SessionThe poster number with "S" is eligible for the Best Student Poster Award nomination.

P01

Research and Development of Magnet for HiSOR-II
Y. Lua, M. Shimadac,a , H. Miyauchic,a, M. Katoha,ba Hiroshima Synchrotron Radiation Center, Hiroshima University, HSRC, Japanb Institute for Molecular Science, Okazaki, IMS, Japanc High Energy Accelerator Research Organization, KEK, Japan

P02S

Experimental Study on Single Electron Storage
Y. Asaia, H. Miyauchib, c, M. Shimadab, c, M. Katohb, d

a Graduate School of Advanced Science and Engineering Hiroshima University, Japanb Hiroshima Synchrotron Radiation Center (HSRC), Hiroshima University, Japanc High Energy Accelerator Research Organization (KEK), Japand UVSOR Synchrotron Facility, Japan

P03

Diffraction of Optical Vortex from Undulator
Y. Nishiharaa, M. Shimadac,b, H. Miyauchic,b, K. Matsuob,a, M. Katohb,a,da School of Science, Hiroshima University,, Japanb Hiroshima Synchrotron Radiation Center (HSRC), Hiroshima University, Japanc High Energy Accelerator Research Organization (KEK), Japand UVSOR Synchrotron Facility, Japan

P04S

Unexpected two-fold symmetry of the electronic structure in heavily
overdoped Bi2201 observed by angle-resolved photoemission spectroscopy
Y. Miyaia, S. Idetab, T. Kurosawac, M. Odad, K. Tanakae, M. Aritab
K. Shimadaba Graduate School of Advanced Science and Engineering, Hiroshima University, Japanｂ Hiroshima Synchrotron Radiation Center, Hiroshima University, Japanc Faculty of Science and Engineering, Muroran Institute of Technology, Japand Department of Physics, Hokkaido University, Japane UVSOR-III Synchrotron, Institute for Molecular Science,Japan

P05S

Comprehensive Studies of the Electronic Structure for the Double-layer
high-Tc Superconductor Bi2Sr2CaCu2O8+ δ- Revisit of the Phase Diagram by ARPES
Y. Tsubotaa, Y. Miyaib, S. Kumarb,c , K. Tanakad, S. Ishidae, H. Eisakie,
S. Nakagawaf, T. Kashiwagif, M. Aritab, K. Shimada a,b, S. Idetaa,ba Graduate School of Advanced Science and Engineering, Hiroshima Univ., Japanｂ Hiroshima Synchrotron Radiation Center (HiSOR), Hiroshima Univ., Japanc Institute of Microelectronics (IME), Agency for Science, Technology and Research(A* STAR), Singapore
d UVSOR-Ⅲ Synchrotron, Institute for Molecular Science, Japane National Institute of Advanced Industrial Science and Technology (AIST), Japanf Division of Materials Science, Tsukuba University, Japan

-Poster SessionThe poster number with "S" is eligible for the Best Student Poster Award nomination.

P06S

Probing the Electronic Band Structure of Altermagnetic
MnTe: An ARPES Study
K. G. Martuzaa, Y. Kumara, S. Kumarb,c, S. Idetaa,b K. Shimadaa,ba Graduate School of Advanced Science and Engineering, Hiroshima University, Japanb Hiroshima Synchrotron Radiation Centre (HiSOR), Hiroshima University, Japanc Institute of Microelectronics, Agency for Science, Technology and Research (A*STAR),
Singapore

P07S

Effects of Quantum Charge Fluctuations on the Electron Self-energy ofHigh–Tc Cuprate Superconductors Using Angle-Resolved Photoemission
and Inverse Photoemission Spectroscopies
Y. Onishia, Y. Miyaia, Y. Tsubotaa, K. Tanakac, S. Ishidad, H. Eisakid,
H. Satob, M. Aritab, K. Shimadaa,b, S. Idetaa,ba Graduate School of Advanced Science and Engineering, Hiroshima Univ., Japanb Hiroshima Synchrotron Radiation Center (HiSOR), Hiroshima Univ., Japanc UVSOR-Ⅲ Synchrotron, Institute for Molecular Science, Japand National Institute of Advanced Industrial Science and Technology (AIST), Japan

P08S

Observation of Topological Surface States and Non-symmorphic Band
Degeneracy in Superconducting PdSeTe Single-crystal
Y. Kumara, S. Kumarb, Y. Venkateswarad, R. Oishia, J. Nayakc, T. Onimarua,
S. Idetaa,b, K. Shimadaa,ba Graduate School of Advanced Science and Engineering, Hiroshima University, Japanb Hiroshima Synchrotron Radiation Centre (HiSOR), Hiroshima University, Japanc Department of Physics, Indian Institute of Technology, Indiad Department of Physics, SUNY Buffalo State University, USA

P09S

Strain-Induced Relocation of Topological Surface States in Bi2Se3 Single
CrystalY. Kumara, S. Kumarb, S. Idetaa,b, T. Okudaa,b, K. Shimadaa,ba Graduate School of Advanced Science and Engineering, Hiroshima University, Japanb Hiroshima Synchrotron Radiation Centre (HiSOR), Hiroshima University, Japan

P10S

Research of Charge Fluctuations in the Electron-doped High-Tc Cuprate
NCCO Revealed by ARPES and IPES
H. Yamaguchia, Y. Onishib, Y. Miyaib, Y. Tsubotab, M. Atirac, K. Tanakad,
H. Satoc, D. Songe, K. Shimadab,c, S. Idetab,ca School of Science, Hiroshima Univ., Japanb Graduate School of Advanced Science and Engineering, Hiroshima Univ., Japanc Hiroshima Synchrotron Radiation Center (HiSOR), Hiroshima Univ., Japand UVSOR-Ⅲ Synchrotron, Institute for Molecular Science, Japane Stewart Blusson Quantum Matter Institute, University of British Columbia, Canada

-Poster SessionThe poster number with "S" is eligible for the Best Student Poster Award nomination.

P11

XPS study on the boron-doped amorphous carbon films
Y. Muraokaa, K. Matusob, T. Wakitaa, T. Yokoyaa

a AResearch Institute for Interdisciplinary Science, Okayama University, Japanb Graduate School of Natural Science and Technology, Okayama University, Japan

P12

Synchrotron ARPES studies of nodal line semimetal LaTe1+xBi1-x
R. Saitoa, Y. Okishia, T. Higashikawaa, T. Wakitaa,b, Y. Kumarc, Y. Miyaic,
H. Kageyamaa, R. Kondoa, Y. Nogamia, S. Idetac, K. Shimadac, Y. Muraokaa,b,
T. Yokoyaa,ba Graduate School of Natural Science and Technology, Okayama University,, Japanb Research Institute for Interdisciplinary Science, Okayama University, Japanc Hiroshima Synchrotron Radiation Center, Hiroshima University, Japan

P13

Current Activities of Research and Education on BL-5 (FY2023)
T. Yokoyaa,b, T. Wakitaa, Y. Muraokaa,ba Research Institute for Interdisciplinary Science, Okayama University, Japanb Research Laboratory for Surface Science, Okayama University, Japan

P14

Visualization of boron distributions in cancer cells dosed with a borondelivery drug
T Wakitaa, K. Igawab, M. Kanedac, N. Ikedac, H. Teratod, Y. Muraokaa,c,T. Yokoyaa,ca Research Institute for Interdisciplinary Science, Okayama University, Japanb INeutron Therapy Research Center, Okayama University, Japanc Graduate School of Natural Science and Technology, Okayama University, Japand Advanced Science Research Center, Okayama University, Japan

P15S

Fermi surface of chiral magnet Yb(Ni1-xCux)3Al9 observed by ARPES
Y. Tanimotoa, M. Sugimotoa, R. Kamimoria, Y. Nakashimab, H. Satoc,
K. Yamagamid, M. Aritac, S. Kumarc, K. Shimadac, S. Nakamurae, S. Oharae
a Graduate School of Advanced Science and Engineering, Hiroshima University, Japanb Faculty of Science, Hiroshima University, Japanc Hiroshima Synchrotron Radiation Center, Hiroshima University, Japand Japan Synchrotron Radiation Research Institute, Japane Graduate School of Engineering, Nagoya Institute of Technology, Japan

P16

ARPES study of TiFexS2 (x = 0, 0.33)
Y. Nakashimaa, Y. Tanimotob, M. Sugimotob, H. Satoc, Y. Miyaib, S. Idetac,
K. Shimadac, M. Miyatad, M. Koyanod

a Faculty of Science, Hiroshima University, Japanb Graduate School of Advanced Science and Engineering, Hiroshima University, Japanc Hiroshima Synchrotron Radiation Center, Hiroshima University, Japand School of Materials Science, Japan Advanced Institute of Science and Technology, Japan

P17S

Preparation of Pt Thin Film on MgO (001) and Observation of Its Electronic
Structure
T. Asanoa, K. Sumidab, K. Kunitomoa, T. Okudab, K. Miyamotob

a Graduate School of Advanced Science and Engineering, Hiroshima University, Japanb Hiroshima Synchrotron radiation Center (HSRC), Hiroshima University, Japan

-Poster SessionThe poster number with "S" is eligible for the Best Student Poster Award nomination.

P18S

Attempt to Control the Anisotropy of Topological Surface States
R. Yamamotoa, K. Sumidab, K. Miyamotob, T. Okudaba Graduate School of Advanced Science and Engineering Hiroshima University, Japanb Hiroshima Synchrotron Radiation Center (HSRC), Hiroshima University, Japan

P19S

Spin-polarized electronic states of FeCo thin film on Rh(001) substrate
K. Kunitomoa, K. Sumidab, K. Miyamotob, C. Zhanga, Y. Sakurabac, T. Okudaba Graduate School of Advanced Science and Engineering Hiroshima University, Japanb Hiroshima Synchrotron Radiation Center (HSRC), Hiroshima University, Japanc National Institute for Materials Science (NIMS), Japan

P20

Ultrafast Spin-Dependent Dynamics in a Carrier-Tuned Topological Insulator
K. Sumidaa, K. Kunitomob, M. Kakokib, K. A. Kokhc, O. E. Tereshchenkoc,
J. Reimannd, J. Güdded, U. Höferd, K. Miyamotoa, T. Okudaa,e, A. Kimurab,ea Hiroshima Synchrotron Radiation Center, Hiroshima University, Japanb Graduate School of Advanced Science and Engineering, Hiroshima University, Japanc Physics Department, Novosibirsk State University, Russia
d Department of Physics and Materials Sciences Center, Philipps-University, Germany
e International Institute for Sustainability with Knotted Chiral Meta Matter (SKCM2), Japan

P21S

Demonstration of phase-resolved spin-ARPES on topological surface states
in Bi2Te3
T. Kousaa, T. Iwataa,b, S. Kumarc, A. Kimuraa,b, K. Miyamotoc, T. Okudab,cK. Kurodaa,ba Graduate School of Advanced Science and Engineering, Hiroshima University, Japanb International Institute for Sustainability with Knotted Chiral Meta Matter(WPI-SKCM2),
Hiroshima University, Japanc Hiroshima Synchrotoron Radiation Center, Hiroshima University, Japan

P22S

Performance of laser-based SARPES with micrometer spatial and vector
spin resolution at HiSOR
T. Iwataa,b, T. Kousaa, A Y. Nishiokaa, K. Ohwadaa, K. Sumidac, E. Annesed,
M. Kakokia, K. Kurodaa,b, H. Iwasawae, M. Aritac, S. Kumarc, A. Kimuraa,b,
K. Miyamotoc, T. Okudab,ca Grad. Sch. Adv. Sci. Eng., Hiroshima Univ., Japanb WPI-SKCM¬2., Hiroshima Univ., Japanc HiSOR, Hiroshima Univ., Japand Brazilian Center for Research in Physics, Brazil
e Institute for Advanced Synchrotron Light Source, National Institutes for Quantum Scienceand Technology, Japan

P23

Direct Observation of Spin-split Electronic Structures in Antiferromagnet
NdBi by Laser-based SARPES
R. Yamamotoa, T. Motoyamab, T. Iwataa,b, T. Kosab, Y. Nishiokab, K. Ideurab,
M. Aritac, S. Idetac, K. Shimadaa,c, K. Miyamotoc, T. Okudaa,c, A. Kimuraa,b,T. Onimarub, K. Kurodaa,ba International Institute for Sustainability with Knotted Chiral Meta Matter (WPI-SKCM2),
Hiroshima University, Japanb Graduate School of Advanced Science and Engineering, Hiroshima University, Japanc Hiroshima Synchrotron Radiation Center, Hiroshima University, Japan

-Poster SessionThe poster number with "S" is eligible for the Best Student Poster Award nomination.

P24

Secondary Structural Changes of FUS-LC induced with Phase-Separation
observed by VUV-CD
K. Fujiia, N. Maitaa, K. Matsuob, M. Katoaa Institute for Quantum Life Science, National Institutes for Quantum Science and Technology,Japanb Hiroshima Synchrotron Radiation Center, Hiroshima-university, Japan

P25

Insights into Physical Interactions and Structuration in Self-Assembled
Azapeptide Hydrogels Through Spectroscopy Techniques
M. Ibrahima,b, J. Bodiguelb, M. Averlant-Petitb, K. Matsuoa

a Hiroshima Synchrotron Radiation Center (HiSOR), Hiroshima University, Japanb Université de Lorraine, CNRS, LCPM, France

P26S

Monitoring the Self-Assembly of Alginate Hydrogel Using Synchrotron Radiation
Circular Dichroism
T. Hagaa, M. Yoshidaa, T. Hainoa, K. Matsuob, M. I.A. Ibrahimb

a Graduate School of Advanced Science and Engineering, Hiroshima University, Japanb Hiroshima Synchrotron Radiation Center (HiSOR), Hiroshima University, Japan

P27S

VUVCD Measurements of dried proteins and its application to proteinmembrane interaction study
K. Hayashia, R. Imauraa, K. Matsuoa,ba Graduate School of Advanced Science and Engineering, Hiroshima University, Japanb Hiroshima Synchrotron Radiation Center, Hiroshima University, Japan

P28

Optical Activity Measurement of Circularly Polarized Lyman-α Light
Irradiated and Magnetic Field Applied Amino-acid Films
J. Takahashia, M. Kobayashib, G. Fujimoric, H. Otad, K. Matsuoe, Y. Tairad,
M. Katohd,e, K. Kobayashic,f, Y. Kebukawaf, H. Nakamuraba Doshisha University, Japanb National Institute for Fusion Science, Japanc Yokohama National University, Japand UVSOR Synchrotron Facility, Japane Hiroshima Synchrotron Radiation Center, Japanf Tokyo Institute of Technology, Japan

P29S

Molecular orientation in polymer/fullerene blend films studied by NEXAFS
Y. Hanakia, H. Yoshidab,c, T. Sekitanib,ca Faculty of Science, Hiroshima University, Japanb Graduate School of Advanced Science and Engineering, Hiroshima University, Japanc Hiroshima Synchrotron Radiation Center, Hiroshima University, Japan

-Poster SessionThe poster number with "S" is eligible for the Best Student Poster Award nomination.

P30S

Charge Transfer in Gold Substrates and Nanoparticles Coated with Methyl
Ester Substituted Aromatic Thiol Molecules
S. Tendoa, A. Niozua, K. Yoshiokaa, J. Adachib, H. Tanakab, S. Wadaa,ba Graduate School of Science and Engineering, Hiroshima University, Japanb Photon Factory, Institute of Materials Structure Science, KEK, Japanc Hiroshima Synchrotron Radiation Center, Hiroshima University, Japan

P31

Ultrafast charge transfer through biphenyl and fluorene monolayers studied
by core-hole clock spectroscopy
A. Niozua, K. Yoshiokaa, S. Tendoa, S. Asakurab, Y. Hanakib, J. Koizumib,
Y. Ohurab, J. Yamadab, S. Wadaa, c
a Graduate School of Science and Engineering, Hiroshima University, Japanb Faculty of Science, Hiroshima University, Japanc Hiroshima Synchrotron Radiation Center, Hiroshima University, Japan

P32

Soft X-ray Absorption Spectroscopy of Phospholipid Films Supported on Au
Substrates by Different Casting Techniques
Y. Ohuraa, K. Yoshiokab, S. Tendob, A. Niozua,b, S. Wadaa,b,c

a Faculty of Science, Hiroshima University, Japanb Graduate School of Science and Engineering, Hiroshima University, Japanc Hiroshima Synchrotron Radiation Center, Hiroshima University, Japan