Conferences and Workshops
Spectroscopies in Novel Superconductors (SNS2019)
June 16-21, 2019
K. Okazaki and H. Wadati
SNS 2019 follows a successful series of international conferences in Argonne (1991), Sendai (1992), Santa Fe (1993);
Stanford (1995), Cape Cod (1997), Chicago (2001), Sitges (2004), Sendai (2007), Shanghai (2010), Berkeley (2013), andStuttgart (2016). Leading experts in spectroscopy, transport, materials, and theory meet to address current issues in the frontierof superconductivity research. Highlights to be discussed include the pairing mechanisms of cuprates, ruthenates, iridates,
iron compounds, heavy-fermion systems, organic compounds, and low-dimensional materials; interplay between superconductivity and competing orders; topological superconductivity; superconductivity in 2D materials, at surfaces, and interfaces;
non-equilibrium superconductivity and its dynamical control; experiments under extreme conditions; new experimentalmethods; and the design and discovery of novel superconductors with higher transition temperatures. This conference was heldat Ito international research center, the University of Tokyo, and organized by the international steering committee, of whichchair is Professor Arun Bansil (Northeastern University, USA), the program committee, of which chair is Professor Takami
Tohyama, and the organizing committee, of which chairs are Professor Atsushi Fujimori and Professor Shik Shin, and advised
from the international advisory committee. There are 208 participants from 21 countries mainly from Japan, China, and USA.
As main topics, the recent progress in charge ordering and physical properties under uniaxial pressure of cuprate high-Tc superconductors, nematic electronic states of cuprates and iron-based superconductors, non-equilibrium superconductivity, superconductivity in magic-angle bilayer graphene, topological superconductivity, and Higgs mode in superconductors were presented.
The programs proceeded in a single track without parallel sessions, and there were 193 presentations including 75 oral presentations (47 invited presentations) and 118 poster presentations. During the conference, discussions were actively conducted
every day. In the closing session, it was announced that the next conference will be held at Bangalore in India, and 6 young
researchers were awarded the young researcher’s prize.

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Computational Approaches to Quantum Many-body Problems (CAQMP2019)
July 16 - Aug. 8, 2019
K. Harada, K. Ido, R. Kaneko, N. Kawashima, Y. Kuramashi, T. Misawa, S. Morita, Y. Motoyama,
T. Nishino, T. Okubo, T. Sakurai, T. Suzuki, K. Tamai, S. Todo, and K. Yoshimi
This event is one of the series of long-term annual international workshops started in 2006, in which a theoretical staff
member serves as the principal organizer. A relatively small number of researchers stay in one place for a longer period thanordinary meetings, focusing on the subjects of remarkable recent progress. The 2019 workshop (CAQMP2019) was the 13th inthe series. The theme of CAQMP2019 was the tensor network and its application. The 2016 workshop (TNQMP2016) was also
dedicated to this subject. Between two workshops, there have been many advances in the methodology and application. Also,
researchers recently became aware of connection between the tensor network and information science. Reflecting them, in thefirst week of the workshop, we discussed new numerical calculation methods, in the second week, the tensor network method,and in the third week, we focused on the connection with information science. The 4th week was dedicated to the comparisonbetween calculations and experiments. We used the same format as in TNQMP2016, i.e., on Mondays, we have symposia, eachconsisting of 30-minute talks, and from Tuesday to Friday, there was a lecture in the morning and a seminar in the afternoon.
The list of the participants included: Anders Sandvik (Boston), Tao Xiang (CAS, Beijing), Laurence Vanderstraeten (Ghent),
Yoshinobu Kuramasu (Univ. Of Tsukuba), Guangming Zhang (Tsinghua), Qibin Zhao (RIKEN), Hyun-Yong Lee (ISSP), LeiWang (CAS, Beijing) and Cristian Batista (Tennessee). The total number of participants, including lectures and symposia,was 538 (of which 380 were lectures and 158 were symposia). Many lectures held this time were all recorded and uploaded toYouTube.

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New Perspective in Spin Conversion Science (NPSCS2020)
February 3-4, 2020
Y. Otani, E. Saitoh, M. Shiraishi, S. Murakami, and A. Oiwa
Spin conversion is a generic term for the phenomena associated with the interconversion between different physical entities
such as electricity, light, sound, vibration, and heat that are mediated by spins. Most spin-conversion phenomena take place atthe nanoscale in the regions near the interface of two diverse varieties of materials, such as magnets, non-magnets, semiconductors, and insulators. The fundamental understanding of the spin conversion phenomena will thus allow us to develop novel
functionalities applicable to practical energy-efficient spintronics as well as thermoelectric devices.
Therefore, we set the purpose of this workshop is for the international spintronics research community, especially for theworld-leading foreign and domestic researchers working on the spin conversion phenomena, to exchange the most recent experimental and theoretical achievements on the spin conversion science. This workshop was also held as a concluding meeting of
the Grant in Aid for Scientific Research in Innovative Areas, "Nano-Spin Conversion Science" conducted from 2014 to 2020.

The workshop was a great success. The 21 invited talks covered a variety of research topics such as spin-chargeinterconversion at the topological surface and Rashba interface states, the magnon-phonon coupling, antiferromagnet
spintronics, superconducting spintronics, and also neuromorphic computing using spin conversion phenomena. Youngresearchers and graduate course students gave 53 poster presentations and participated in animated discussions at theworkshop. The total number of participants was 183. Lastly, we much appreciate everyone's generous support, including
the organizers, judges, directors, secretaries, and student part-timers. Without any help from the members, this could nothave been accomplished.

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Computational Materials Science —New Perspectives—

April 2-3, 2019
T. Ozaki, N. Kawashima, O. Sugino, H. Noguchi, Y. Higuchi, S. Morita, H. Watanabe,
H. Kawamura, J. Haruyama, T. Hoshi, T. Tohyama, and H. Okuyama

This workshop was organized for the computational condensed matter research community, especially for the users of the ISSP supercomputers, to exchange the most recent research progress and related information on the computational condensed matter research and on
the high-performance computation of related research areas. This was held as a series of annual workshop of ISSP supercomputer that has
been held every year. The selected topics include the target of the post-K supercomputer project, the progress made in the elements strategy
projects, the emergent data-driven material
research, and “the Project for advancement ofsoftware usability in materials science” thatin 2019 developed abICS, which is a software
framework for performing configurational
sampling in disordered systems, with a specificemphasis on multi-component solid state systems
such as metal and oxide alloys, and TeNes, which
is a solver for 2D quantum lattice system basedon a PEPS wave function and the CTM method.
In addition to 16 invited talks and 30 poster
presentations, two special lectures were given
by Prof. Miyashita and Prof. Fujii for quantum
states of photons and quantum computing,respectively.

Joint Workshop of Novel Material Development and Measuring Technique by Using
High-Pressure

July 5-6, 2019

F. Iga, Y. Uwatoko, and C. Sekine
Much novel and interesting physical properties such as superconductivity, metal-insulator transition and multipole transition
induced under high-pressure condition have been found in recent years. Furthermore, much novel interesting materials by using
high pressure synthesis have been also developed recently. High-pressure technology in Japan is historically on the top classin the world, but it becomes severe in international competition in recent years. Researchers of condensed matter physics andgeophysics fields have carried development of high-pressure synthetic technology together, while sometimes influencing somedegree independence each other, up to date. This joint workshop at ISSP has been organized for the high-pressure community
to discuss the recent interesting physics and exchange the most recent information on each measurement technique.
In the workshop, 19 of oral and 25 poster presentations in total have been held for 2 days, and the participants had fruitful
discussion, especially including a topic of room
temperature superconductivity. The 1st day participants were 75 people (47 people from outside
ISSP and 28 from the campus) and the number ofthe participants of the 2nd day were 49 (36 fromoutside and 28 from the ISSP). It can be said that
this workshop has succeeded in accomplishing
purposes as expected.

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Physics and Chemistry of Light-induced Functions of Retinylidene Proteins
September 5-6, 2019
K. Inoue
Retinal proteins (rhodopsins) are photoreceptive membrane proteins that exist in an extremely wide range of biological
species, from bacteria to animal, and giant viruses. When the retinal protein absorbs light, the retinal chromophore is isomerized and various physiological functions such as ion transport, enzymatic reaction and intracellular signal transduction
are expressed. To achieve common understanding of the current situation of the study on retinal proteins, we held an ISSP
workshop presenting cutting-edge researches by representative retinal protein researchers in Japan. This workshop was also
positioned as a satellite symposium of the International Conference on Retinal Proteins, which is held in Ise-Shima in 2020.
Totally, 111 people participated, and one keynote speech, 22 invited speeches, and 24 poster presentations from the generalpublic were given. They presented recent studies on non-equilibrium processes in expression of the biological functions using
advanced laser spectroscopy, structural studies by synchrotron x-ray radiation and free electron laser, and NMR, large-scalecomputational study, and so on. Throughout the workshop, many opinions on the current situation in the discipline and new
problems to be solved were actively exchanged.

Helium Crisis: Present and Future

November 6, 2019
S. Ohara, H. Kawamura, H. Mori, S. Katsumoto, K. Kindo, T. Kondo, H. Tsuchiya, R. Sagiyama, and M. Yamashita

Shortage of helium supply directly hits researchers and is threatening sustainability of current academic studies all over theworld. Helium is indispensable not only for condensed-matter scientists, but also for those in various research fields including
elementary-particle physics, astronomy, and chemistry. Moreover, helium is unsubstitutable gas for many industrial uses, suchas medical MRI examinations, productions of semiconductors and optical fibers, etc. Helium supply in Japan totally depends onimports from unstable suppliers in limited production areas, resulting “Helium Crisis” frequently. The present Helium Crisis is
more serious than ever before because the demands from developing countries increase rapidly despite the decrease of supplies
from United States.
In this workshop, we assembled academic scientists from different research area and participants from relevant companies
to discuss the present status and possible future perspectives. We first discussed the current situations happening in research
institutions. A review regarding the situation of gas supplying companies was also given by Y. Koizumi, president of Gas
Review. Discussions about the restrictions
applied to liquid helium and subjects to form
the urgent proposals were also given.
One of the focus topics of this workshop
was a helium-recycle framework by utilizing
helium liquefying facilities of academic
places. Recycling helium from vaporized
helium gas is limited in research institutions
equipped with expensive helium-liquefaction
facility. Therefore, sharing a liquefaction
facility with neighboring sites can considerably save the cost for recycling helium.
Successful cases were reported from thecollaborations between OIST and Universityof the Ryukyus and those between JAXA andOsaka University. It was also pointed out as
an important future issue to build stockpilesof helium gas for preparing shortage. We
hope that this workshop will be taken as anopportunity to enhance helium recycle inJapan.

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New Development of High Magnetic Field Science by HMF Collaboratory—Associated with Optical Science—

December 3-5, 2019
M. Hagiwara, K. Kindo, M. Tokunaga, Y. H. Matsuda, H. Nojiri, T. Sasaki, S. Tajima, N. Hanasaki, and Y. Narumi

This workshop was organized by high magnetic field (HMF) forum, the members of which are HMF users and providers, toexchange the most recent information on the development of measurement techniques and scientific research in high magneticfields, and to aim at the association with optical science. This was held for the first time outside ISSP, namely Osaka University where the Joint-usage program of HMF research is conducted by the Center for Advanced High Magnetic Field Sciencewith International MegaGauss Science Laboratory at ISSP as a new network-type Joint Usage/Research Center. A variety ofscientific topics including optical science (magnetic alloy, multiferroics, heavy fermions, frustrated magnets, quantum magnets,
topological materials, magnetic semiconductors, measurement techniques, theory and so on.) were presented at this workshop.
In addition to 20 talks and 57 poster presentations, 6 invited talks by optical scientists were given. The number of registeredparticipants was 112. During the workshop, present status and future plan of HMF facilities in Japan and a western Japan HMF
network named KOFUC network were also provided.

Innovations to the Next-Generation Synchrotron Radiation

February 14, 2020
I. Matsuda, T. Arima, F. Komori, Y. Harada, H. Mimura, and T. Kondo

A plan for the next-generation synchrotron radiation facility was launched in Japan and the user-experiments are expectedfrom 2023. Ten beamlines are planned by the Photon Science Innovation Center (PhoSIC) and the National Institutes for
Quantum and Radiological Science and Technology (QST). There have been vigorous discussions on experimental methods
for the individual beamlines that are expected to innovate our science and technology, including novel X-ray optics, advanced
measurements, informatics analyses and automatic controls by AI robots.
To promote our project toward the new synchrotron radiation facility, we organized this workshop at the ISSP lectureroom with broadcast live at SPring-8. It has successfully brought together 91 participants with fruitful discussion on these newtechnologies and foresights of the coming science. The program started with invite talks by Dr. Tetsuya Nakamura (PhoSIC)
and Dr. Masamitsu Takahashi (QST), introducing their beamlines. In the following, there were invited talks by leading young
researchers who made presentations on technical innovations for synchrotron radiation. We had a poster session by graduate
students and postdocs who shared their new results and actively discussed with each other. Participants were confident to findthat our next-generation synchrotron radiation facility would be developed by our next generations.

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