bluuebunny/crossref_metadata_2025_split huggingface dataset:
Role of the remnant symmetries in gravitational theories based on absolute parallelism: a 2D standpoint
Authors: Fiorini Franco , Paliathanasis Andronikos 
Published: March 2022

Abstract
By using simplified 2D gravitational, non-Lorentz invariant actions constructed from the torsion tensor, we discuss the physical meaning of the remnant symmetries associated with the near-horizon (Milne) geometry experienced by a radial observer in Schwarzschild spacetime. We then fully characterize the remnant symmetries corresponding to this near-horizon 2D geometry by solving the motion equations adapted to 2D Milne space. This symmetries, which represent special or privileged diads, acquire the form of uniformly accelerated (Rindler) observers whose constant acceleration is proportional to the black hole mass M.
Exact analytical solution of the driven qutrit in an open quantum system: V and Λ configurations
Authors: Coleman Zachary C , Carr Lincoln D 
Published: March 2022

Abstract
We obtain the exact analytical solution for the continuously driven qutrit in the V and Λ configurations governed by the Lindblad master equation. We calculate the linear susceptibility in each system, determining regimes of transient gain without inversion, and identify exact parameter values for superluminal, vanishing, and negative group velocity for the probe field.
Effect of H atoms and UV wideband radiation on cured low-k OSG films
Authors: Lopaev D V , Zotovich A I , Zyryanov S M , Bogdanova M A , Rakhimova T V , Mankelevich Y A , Novikova N N , Seregin D S , Vishnevskiy A S , Vorotilov K A , Shi Xiaoping , Baklanov M R 
Published: March 2022

Abstract
Effects of hydrogen atoms and UV radiation (λ > 210 nm) on nanoporous organosilicate glass (OSG) low-k films are studied in the temperature range from 20 °C to 300 °C. The purpose of the study is to understand the mechanisms of low-k films modification that can happen during the cleaning from carbon containing residues formed from sacrificial porogen and accumulated during the air storage. It is shown that exposure of low-k films to hydrogen atoms at low temperature leads to slight modification of hydrocarbon bonds in hydrocarbon residues not bonded to Si. At high temperature (T ⩾ 300 °C), the relative concentration of –CH
x
bonds changes in a complex way and depends on the amount and structure of the carbon-containing compounds. The general trend is relatively rapid decrease of –CH2 bonds concentration, while the terminal –CH3 groups are more stable. Temperature also initiates the reaction of hydrogen atoms with low-k with partial modification of low-k matrix breaking Si–O bonds. The destruction of Si–O and Si–CH2 groups leads to the formation of oxygen-deficient centers, followed by the formation of Si–(CH3)2 groups due to their interaction with methyl groups. At 300 °C, the total number of Si–CH3 + Si–(CH3)2 groups starts to decrease indicating on partial removal of the methyl groups bonded to silicon. Besides with increasing temperature a slight modification of the structure of matrix under exposure to H atoms is also observed. UV radiation has almost no effect on these processes in the studied conditions. Thus, there exist the ‘optimal’ conditions for H atom impact on OSG low-k films which allows improving film performance by removing porogen residue without damage.
Power generation cell driven by osmotic pressure in microchannels with hydrophobic surfaces and viscoelectric effects
Authors: Sánchez G , Méndez F 
Published: March 2022

Abstract
A theoretical study that explores power generation via streaming potential and osmotic gradients is proposed. The system is compounded by an osmotic membrane that has different saline concentrations on each side. This concentration gradient promotes a volumetric flux rate inside a microchannel with parallel plates whose surfaces are made of modified hydrophobic fumed silica, thus, the no-slip condition is no longer sustained. Aside from these characteristics, we consider viscoelectric effects in the analysis. The set of equations is written in dimensionless variables, which are solved with integrodifferential methods, permitting us to obtain semi-analytical solutions for velocity, pressure fields, and the most important: the electric potential generated for the system. This setup converts concentration gradients into electric energy in the form of streaming potential. Besides, we demonstrate that hydrophobic surfaces promote a greater induced streaming potential, nonetheless, for high potentials appears a saturation phenomenon which avoids the growth of the induced electric potential no matter how large the slip-conditions could be.
Optical properties of individual CdS/CdSe/CdS nanocrystals: spherical quantum wells as single-photon sources
Authors: Allemand A , Kulzer F , Mahler B , Dujardin C , Houel J 
Published: March 2022

Abstract
We have synthesized CdS(1.3 nm)/CdSe(1.7 nm)/CdS(3.4 nm) spherical quantum wells (SQWs) with a diameter of 13 nm and demonstrated the first photon-antibunching from their emission, labelling them as single-photon sources. Antibunching survives even at high excitation intensities, ruling-out strong emission from the bi-exciton. For the largest intensities, antibunching coupled to spectral measurements reveal the signature of a blue-shifted emission, associated to an irreversible photo-aging effect. A statistical analysis over 26 SQWs demonstrates a moderate correlation between the energy of the main and the blue-shifted emission. Intensity-timetraces recorded on 28 single SQWs show weak blinking, with a median time spent in the bright state of 89%. Their emission decay reveals a complex dynamic with either three or four exponential components. We assigned three of them to the neutral and singly-charged excitons and the slowest to defect emission. While SQWs have been initially designed for laser-oriented applications, we demonstrate that they can serve as efficient single-photon sources.
Effect of praseodymium in cation distribution, and temperature-dependent magnetic response of cobalt spinel ferrite nanoparticles
Authors: Nikmanesh Hossein , Jaberolansar Elnaz , Kameli Parviz , Varzaneh Ali Ghotbi 
Published: March 2022

Abstract
This work reports cation distribution, magnetic, structural, and morphological studies of rare-earth Pr doped cobalt ferrite nanoparticles CoFe2−x
Pr
x
O4 (x = 0, 0.02, 0.04, 0.06 at%) fabricated by sol-gel auto-combustion method. X-ray diffraction analysis, field emission scanning electron microscopy (FESEM), high resolution transmission electron microscopy (HRTEM), selected area electron diffraction (SAED), and Fourier-transform infrared (FTIR) microscopy were utilized to study the structural and morphological characteristics of the prepared samples. Rietveld refinement by the Material Analyses Using Diffraction (MAUD) software showed the formation of mono-phase cubic spinel structure with Fd-3m space group; however, there was a trace of impure PrFeO3 phase for the sample CoFe1.96Pr0.04O4 (x = 0.06). Cation distribution was inferred from the XRD patterns using MAUD program. FESEM analysis revealed the spherical-shaped particles with dimensions close to the data extracted from XRD analysis and HRTEM images confirmed it. FTIR measurements revealed the presence of two prominent stretching vibrational modes confirming the successful formation of ferrite spinel structure. Magnetic properties of the nanoparticles were measured at two different temperatures 300 K and 10 K. For the low temperature of 10 K a high sensitive measurement method as Superconducting Quantum Interference Device (SQUID) magnetometry was used and Vibrating Sample Magnetometer (VSM) recorded the magnetic data at 300 K. Comparison of the magnetic results exhibited a significant enhancement with temperature drop due to the reduction in thermal fluctuations. Paramagnetic nature of rare-earth ions may be the main reason for M
S decrement from 76 emu g−1 (x = 0.0) to 60 emu g−1 (x = 0.02) at 300 K. At 10 K, the estimated cation distribution played a vital role in justification of obtained magnetic results. All the obtained data showed that the synthesized magnetic nanoparticles can be implemented in permanent magnet industry and information storage fields, especially when it comes to lower temperatures.
Investigation of stretchable strain sensor based on CNT/AgNW applied in smart wearable devices
Authors: Liu Meng-Yang , Hang Cheng-Zhou , Wu Xue-Yan , Zhu Li-Yuan , Wen Xiao-Hong , Wang Yang , Zhao Xue-Feng , Lu Hong-Liang 
Published: March 2022

Abstract
Stretchable strain sensor, an important paradigm of wearable sensor which can be attached onto clothing or even human skin, is widely used in healthcare, human motion monitoring and human-machine interaction. Pattern-available and facile manufacturing process for strain sensor is pursued all the time. A carbon nanotube (CNT)/silver nanowire (AgNW)-based stretchable strain sensor fabricated by a facile process is reported here. The strain sensor exhibits a considerable Gauge factor of 6.7, long-term durability (>1000 stretching cycles), fast response and recovery (420 ms and 600 ms, respectively), hence the sensor can fulfill the measurement of finger movement. Accordingly, a smart glove comprising a sensor array and a flexible printed circuit board is assembled to detect the bending movement of five fingers simultaneously. Moreover, the glove is wireless and basically fully flexible, it can detect the finger bending of wearer and display the responses distinctly on an APP of a smart phone or a host computer. Our strain senor and smart glove will broaden the materials and applications of wearable sensors.
Ag metal interconnect wires formed by pseudoplastic nanoparticles fluid imprinting lithography with microwave assistant sintering
Authors: Liu Boyu , Yu Yongli , Hu Zhennan , Li Mengke , Ma Liuhong , Sun Haibin , Jia Jianxin , Jiang Changhui , Zhong Yinghui , Chen Yuwei , Duan Zhiyong 
Published: March 2022

Abstract
Nanoimprint technology has the advantages of low cost, high precision, high fidelity and high yield. The metal nanoparticle fluid is non-Newtonian fluid, which is used as the imprint transfer medium to realize high fidelity of pattern because of its shear thinning effect. In order to functionalize the metal nanoparticles microstructure, the subsequent sintering step is required to form a metal interconnect wire. Metal interconnect wire with fewer grain boundaries and fewer holes have excellent mechanical and electronic properties. In this paper, the pseudoplastic metal nanoparticle fluid was formed by Ag nanoparticle and precursor solution, and then the thermal diffusion process was completed by microwave sintering after interconnects were embossed. The influence of microwave and thermal atmosphere on the microstructure and performance of Ag Interconnect wires was analyzed and discussed, and the Ag Interconnect wires performance was determined under the influence of time and temperature parameters. In our experiments, the interconnects after microwave sintering can achieve 39% of the conductivity of bulk silver. The microwave sintering module might be integrated as the heat treatment module of the metal micro/nano pattern directly imprint lithography.
Multi-task multi-level feature adversarial network for joint Alzheimer’s disease diagnosis and atrophy localization using sMRI
Authors: Han Kangfu , He Man , Yang Feng , Zhang Yu 
Published: March 2022

Abstract
Capitalizing on structural magnetic resonance imaging (sMRI), existing deep learning methods (especially convolutional neural networks, CNNs) have been widely and successfully applied to computer-aided diagnosis of Alzheimer’s disease (AD) and its prodromal stage (i.e. mild cognitive impairment, MCI). But considering the generalization capability of the obtained model trained on limited number of samples, we construct a multi-task multi-level feature adversarial network (M2FAN) for joint diagnosis and atrophy localization using baseline sMRI. Specifically, the linear-aligned T1 MR images were first processed by a lightweight CNN backbone to capture the shared intermediate feature representations, which were then branched into a global subnet for preliminary dementia diagnosis and a multi instance learning network for brain atrophy localization in multi-task learning manner. As the global discriminative information captured by the global subnet might be unstable for disease diagnosis, we further designed a module of multi-level feature adversarial learning that accounts for regularization to make global features robust against the adversarial perturbation synthesized by the local/instance features to improve the diagnostic performance. Our proposed method was evaluated on three public datasets (i.e. ADNI-1, ADNI-2, and AIBL), demonstrating competitive performance compared with several state-of-the-art methods in both tasks of AD diagnosis and MCI conversion prediction.
Simulations of scrape-off layer power width for EAST H-mode plasma and ITER 15 MA baseline scenario by 2D electrostatic turbulence code
Authors: Liu X. , Nielsen A.H. , Rasmussen J.J. , Naulin V. , Wang L. , Ding R. , Li J. 
Published: March 2022

Abstract
The scrape-off layer power width (λ

q
) is an important parameter for characterizing the divertor heat loads. Many experimental, theoretical, and numerical studies on λ

q
have been performed in recent years. In this paper, a 2D electrostatic turbulence code, BOUT-HESEL, has been upgraded to simulate H-mode plasmas for the first time. The code is validated against the previous implementation and the experimental λ

q
scalings for L-mode plasmas and experiments with a typical EAST H-mode discharge. The simulated λ

q
is found to agree quite well with the Eich scaling [Eich et al 2013 Nucl. Fusion
53 093031] for the EAST H-mode discharge and the comparison of the probability distribution function of the parallel particle flux with the measurements by reciprocating probes is also consistent. The code is utilized to simulate the ITER 15 MA baseline scenario [Kim et al 2018 Nucl. Fusion
58 056013]. The ITER simulation reveals that the radial particle/heat transports are dominated by blobby transports, and predicts λ

q,ITER = 9.6 mm, which is much larger than the prediction by the Eich scaling (λ

q,ITER ≈ 1 mm). Based on the EAST modified cases, an estimated HESEL H-mode scaling,

λ

q

=
0.51

R

c

1.1

B

t

−
0.3

q

95

1.1

is proposed. This scaling predicts λ

q,ITER = 9.3 mm, which agrees surprisingly well with that for the ITER case. A further investigation combined with the basic parameters in the database of the Eich scaling shows that the missing positive scaling dependence on the machine size (R
c) in the Eich scaling appears to be shaded by the negative scaling dependence on the toroidal magnetic field (B
t) for current devices. This is however not the case for ITER, explaining why simulations in recent studies and this paper can reproduce the Eich scaling for current devices, but predict a much larger λ

q
for ITER. According to the simulation results, the strong positive scaling dependence of λ

q
on R
c is due to a combination of slowing down the parallel heat transports by increasing the parallel connection length and the enhancement of the radial E × B turbulent heat transports when the machine size is increased.
The 2020 Strongly Correlated Electron Systems Conference
Authors: Pagliuso Pascoal J. G. , Adriano Cris , Miranda Eduardo 
Published: March 2022

The International Conference on Strongly Correlated Electrons systems (SCES) is one of the most traditional conferences in Condensed Matter Physics worldwide. SCES continues to bring together, in every edition, outstanding scientists working in the frontiers of the complex and advanced phenomena of this area. The SCES 2020 Edition was planned to be an in-person event in Guaruja, SP, Brazil in September of 2020 as a continuation of the successful series of the SCES conferences: Sendai (’92), San Diego (’93), Amsterdam (’94), Goa (’95), Zurich (’96), Paris (’98), Nagano (’99), Ann Arbor (’01), Krakow (’02), Karlsruhe (’04), Vienna (’05), Houston (’07), Buzios (’08), Santa Fe (’10), Cambridge (’11), Tokyo (’13), Grenoble (’14), Hangzhou (’16), Prague (’17) and Okayama (’19). Additionally, every three years since 1997, SCES has been joining the International Conference on Magnetism (ICM) held in: Cairns (’97), Recife (’00), Rome (’03), Kyoto (’06), Karlsruhe (’09), Busan (’12), Barcelona (’15), and San Francisco (’18).
List of The international advisory committee, The prize committee, The publication Committee, The organizing committee, The local committee are available in this pdf.
Orbital selective dynamics in Fe-based systems using time-resolved ARPES
Authors: Maiti Kalobaran 
Published: March 2022

Abstract
Exoticity in material properties is often linked to the complex interplay of spin, charge, orbital and lattice degrees of freedom that makes the study of the origin of such exoticity difficult. The outstanding issue is to disentangle parameter space and reveal the underlying physics. We propose a unique method to excite electrons of a selected symmetry without significant effect on other electrons using polarized pump light pulse in a pump-probe experiment. Using this technique, we show that the relaxation of itinerant electrons occurs faster than the local electrons; the first experimental identification of the orbital selective electron dynamics in a complex correlated system, EuFe2As2. In another experiment, we discover that the magnetic order in CaFe2As2 can be melted selectively without significant effect on electrons in the other energy bands. These results provide two important conclusions; (i) magnetism in Fe-based systems may not be linked to the phase space occupied by other electrons and (ii) polarized pump excitation in a pump-probe experiment is a novel method to study orbital selective dynamics.
Nodal gaps from local interactions in Sr2RuO4
Authors: Ramires Aline 
Published: March 2022

Abstract
Sr2RuO4 has been under intensive scrutiny over the past years after new NMR measurements unveiled that the superconducting state might be spin singlet. One of the best order parameter candidates in light of these new experiments is a chiral state with Eg
symmetry. This order parameter, with a horizontal nodal line, has been overlooked given the strong two-dimensional character of the normal state electronic structure. Recently, a phenomenological proposal based on local interactions showed that an even-parity orbital-antisymmetric spin-triplet (OAST) chiral state can be stable in Sr2RuO4 once momentum-dependent spin-orbit coupling is properly taken into account. Here we discuss the origin of the nodes and dips in this order parameter as inherited from the normal state Hamiltonian, showing that a nodal gap can emerge out of purely local interactions and connect the presence of nodes with the superconducting fitness measure.
Pressure-induced superconductivity in lightly doped RFeAsO1-xFx (R=Sm and Nd)
Authors: Miyoshi K. , Shiota A. , Matsuoka T. , Otsuka K. , Nishigori S. , Kitagawa H. 
Published: March 2022

Abstract
We performed the measurements of electrical resistivity (ρ) and dc magnetization (M) as a function of temperature (T) under pressure to investigate whether or not the superconductivity is induced by the application of pressure in lightly doped RFeAsO1-xFx (R=Sm and Nd) using pulse current sintered (PCS) high density polycrystalline specimens. We have successfully observed pressure induced superconductivity with T
c of ∼6 K (∼8 K) above ∼4 GPa (∼1 GPa) for R=Sm (R=Nd). An anomaly corresponding to a magnetic phase transition into spin density wave (SDW) state was observed in the ρ(T) curves in the entire pressure range, indicating that the superconducting and SDW states coexist in the T-P phase diagram. Volume fraction of the superconductivity is found to be very small. This is consistent with the coexistence of the superconducting and SDW phases.
Tobological feedback for superconducting states
Authors: Tobita Yutaka , Goryo Jun 
Published: March 2022

Abstract
We discuss feedback effects that stabilize the superconducting states by the induced topological term in the effective Lagrangian. The chiral feedback effect due to the Chern-Simons-like term for quasi-two-dimensional system with time-reversal symmetry breaking (TRSB) was studied in [1, 2]. We consider the extension of the chiral feedback to three-dimensional TRSB system and investigate similar feedback effects for quasi-two-dimensional or three-dimensional time-reversal symmetric systems.
Spontaneous spin polarization at the edge of the chiral superconducting states in a spin Hall metal
Authors: Imazu Tsuyoshi , Goryo Jun 
Published: March 2022

Abstract
We discuss the chiral superconducting state in a square lattice system with an intrinsic spin-orbit coupling causing the spin Hall effect. We estimate the spontaneous spin polarization (local moment) 〈mi
〉 at the i-th site and its sum M = ∑
i
〈mi
〉 in ribbons. In the zigzag ribbon, we see 〈mi
〉 ≠ 0 near the edge. The energy spectra of the chiral edge states show the spin splitting and then we have non-zero M. Moreover, we find that M is enhanced significantly at a topological phase transition point, where the energy gap is closing. We also have non-zero 〈mi
〉 near the edge of the straight ribbon, but in contrast, there is no spin splitting in the spectra and M vanishes.
Determination of the magnetic structures in the heavy fermion superconductor Ce3PtIn11
Authors: Shioda Naoki , Kazuki  , Kumeda  , Fukazawa Hideto , Ohama Tetsuo , Kohori Yoh , Das Debarchan , Blawat Joanna , Kaczorowski Dariusz , Sugimoto Koudai 
Published: March 2022

Abstract
Comprehensive analyses of the 115In-NQR spectra employing a magnetic dipolar model and a transferred hyperfine model are performed to determine the magnetic structures of Ce3PtIn11. Based on this analysis, we confirmed that the magnetic moment at the Ce(1) site is very small (∼ 4% of that at the Ce(2) site) but finite. Further, for T
N2 < T < T
N1 and T < T
N2, the magnetic moments at the Ce(1) and Ce(2) sites are parallel to the c-axis, and the in-plane propagation vectors in the two Ce atoms sublattices are (qa, qb
) = (1/2, 1/2). In the temperature interval T
N2 <T < T
N1, for example, both of them have a form of
q
= (1/2, 1/2, 0). For T < T
N2, the magnetic structure in the Ce(2) sublattice is defined by the propagation vector
q
= (1/2, 1/2, 1/2 or 0), whereas the Ce(1) sublattice forms a six-fold period structure given by
q
= (1/2, 1/2, 1/6).
Thermal Expansion in a diluted Ce system La1–x
Ce
x
Cu6
Authors: Yamane Y. , Maeda T. , Yamaguchi A. , Sumiyama A. , Ōnuki Y. 
Published: March 2022

Abstract
The thermal expansion of a diluted Ce system La1-x
Ce
x
Cu6 for (0.6 ≤ x ≤ 1) has been measured between 10 and 150 K to reveal the change from the coherent heavy Fermion state (0.9 ≤ x ≤ 1) to the incoherent Kondo state (0 < x ≤ 0.73). The large Ce concentration x dependence of the linear thermal expansion coefficient along b-axis αb
(T) suggests that the coupling between the 4f
1 electron and the lattice strain is the largest along the b-axis in the three crystallographic axes. The maximum of the magnetic contribution to the volume thermal expansion coefficient β
m(T) at T = 50 K is retained in the x range of 0.6 ≤ x ≤ 1, suggesting the crystalline electric field (CEF) level for x = 1 doesn’t change by the substitution. Furthermore, the upturn in β
m(T) below 25 K, which should be a precursor of the maximum at T = 2.5 K reported for x = 1, is retained when we decrease x from 1 to 0.6. Because the ground state for x = 0.6 is the incoherent Kondo state, the robustness of the maximum at T = 50 K and upturn in the current x value implies that β
m(T) in 10 ≤ T ≤ 150 K is attributed to the CEF and Kondo effects rather than the formation of the heavy Fermion state.