样式: 排序: IF: - GO 导出 标记为已读
-
Realistic Simulation of Valence-Band Photoemission Spectra by Using First-Principles Calculations on the Basis of FLAPW Method J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-04-24 Noriaki Hamada, Satoshi Nakamura, Kenta Takahashi, Mario Okawa, Tomohiko Saitoh
In order to reproduce experimental photoemission spectroscopy (PES) data by using band structure calculations with linearized augmented-plane-wave method, we developed a new method to calculate the atomic-subshell photoelectron differential cross section (PE-DCS) of the valence band. PE-DCS was calculated to be the sum of the products of the partial density of states (PDOS) and the photoionization
-
Intermolecular Correlations in Liquid Lactic Acid Based on ab initio Molecular Dynamics Simulations Combined with High-Energy X-ray Diffraction Measurements J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-04-23 Kai Ito, Hironori Shimakura, Shuta Tahara, Koji Ohara, Akihide Koura, Kohei Shimamura, Fuyuki Shimojo
The structural and bonding properties of liquid L-lactic acid were investigated through ab initio molecular dynamics simulations, leveraging on the agreement between the static structure factors obtained from high-energy X-ray diffraction (HEXRD) measurements. It has been demonstrated that predominant intermolecular interactions arise from hydrogen bonding. Hydrogen atoms in two hydroxy groups tend
-
RKKY Interactions and Multipole Order in Ab initio Wannier Model of CeCoSi J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-04-23 Takemi Yamada, Yuki Yanagi, Keisuke Mitsumoto
We calculate the RKKY interactions derived from ab initio calculations for the intermetallic compound CeCoSi exhibiting the hidden nonmagnetic order at T0 and examine the instability towards possible multipole orders within the random phase approximation. All 36 multipole interactions up to rank 5 are investigated, and the maximum susceptibility exhibits an antiferro order with q = 0 for nonmagnetic
-
Multi-Triplon Excitations of Hubbard Ladders with Site-Dependent Potentials J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-04-22 Nobuya Maeshima, Ken-ichi Hino
We study low-lying spin-singlet excitations of two-leg Hubbard ladders with site-dependent potentials. Using general formulas of the charge disproportionation induced by the site-dependent potentials, we derive the contributions of spin degrees of freedom to the spectral functions such as the dynamical charge structure factor \(N(\boldsymbol{k},\omega )\) and the optical conductivity σγ(ω) along the
-
Investigation of Vibration and Sensing of Chalcogenide Microfiber Integrated with Hollow-core Fiber J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-04-18 Hongkun Guo, Huili Fan, Hui He, Liwen Cheng, Huibo Fan
We propose and investigate a fiber-optic sensor of As2Se3 chalcogenide (ChG) microfiber laterally adhered on the hollow-core fiber (HCF) end face. HCF is fused with a single-mode fiber to form Fabry–Perot interferometer (FPI) between single-mode fiber (SMF) end face and ChG microfiber. ChG microfiber is ultra-sensitive to the small perturbations in the surroundings, because of its high refractive index
-
Hydrostatic Pressure Studies on Non-Superconducting UTe2 J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-04-16 M. O. Ajeesh, Joe D. Thompson, Eric D. Bauer, Filip Ronning, Sean M. Thomas, Priscila F. S. Rosa
We report the temperature–pressure phase diagram of a UTe2 single crystal that does not undergo a bulk superconducting transition but shows filamentary superconductivity with a critical transition temperature of 1 K at ambient pressure. Electrical-resistivity measurements reveal that the evolution of the filamentary superconducting state under pressure resembles the behavior observed in previous reports
-
Evaluation of the Exchange Stiffness Constants of Itinerant Magnets at Finite Temperatures from the First-Principles Calculations J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-04-16 Akimasa Sakuma
We attempted to evaluate the exchange stiffness constant, A(T) of fcc-Fe0.2Ni0.8 and L10-type FePt at finite temperatures employing the first-principles calculation. The spin fluctuation at a finite temperature was handled using the coherent potential approximation under the disordered-local-moment picture, and the A(T) was evaluated based on the free energy of spin spiral structure created in the
-
Repetitive Infection Spreading and Directed Evolution in the Susceptible–Infected–Recovered–Susceptible Model J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-04-15 Hidetsugu Sakaguchi, Keito Yamasaki
We study two simple mathematical models of an epidemic. First, we study the repetitive infection spreading in a simplified susceptible–infected–recovered–susceptible (SIRS) model including the effect of the decay of the acquired immunity. The model is an intermediate of the SIRS model including the recruitment and death terms and the SIR model in which the recovered population is assumed to be never
-
Effect of Quadrupole and Hexadecapole Deformations of Target on Projectile J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-04-11 Narayanaswamy Manjunatha, Holaly Chandrashekara Shastry Manjunatha, Nagaraj Sowmya, Krishnachari Nagarathnamma Sridhar, Padhmaghatta Somashekaraih Prabhavathi
To investigate the effect of the magnitude of deformations on heavy-ion fusion reactions, we have considered reactions in such a way that the deformations of the target varied whereas that of the projectile remained the same. Using an advanced statistical model, we investigated fusion reactions of 4He+233–238U, 48Ca+204–208Pb, and 48Ca+240–244Pu. The influence of quadrupole and hexadecapole deformations
-
Optimized Synthesis of Circuits for Diagonal Unitary Matrices with Reflection Symmetry J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-04-11 Xinchi Huang, Taichi Kosugi, Hirofumi Nishi, Yu-ichiro Matsushita
During the noisy intermediate-scale quantum (NISQ) era, it is important to optimize the quantum circuits in circuit depth and gate count, especially entanglement gates, including the CNOT gate. Among all the unitary operators, diagonal unitary matrices form a special class that plays a crucial role in many quantum algorithms/subroutines. Based on a natural gate set \(\{ \text{CNOT},R_{z}\} \), quantum
-
Quantum Painlevé Second Lax Pair and Quantum (Matrix) Analogues of Classical Painlevé II Equation J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-04-11 Muhammad Waseem, Irfan Mahmood, Hira Sohail, Ejaz Hussain, Hosam O. Elansary
In this article, we present a quantum Painlevé second Lax pair that explicitly involves the Planck constant ħ and an arbitrary field variable v which distinguish it from the existing Flaschka–Newell Painlevé second Lax pair. We show that Flaschka–Newell pair appears as a special case of our quantum Painlevé second Lax pair. It is shown that the compatibility of quantum Painlevé second Lax pair simultaneously
-
Seebeck Effect of Dirac Electrons in Organic Conductors under Hydrostatic Pressure Using a Tight-Binding Model Derived from First Principles J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-04-08 Yoshikazu Suzumura, Takao Tsumuraya, Masao Ogata
The Seebeck coefficient is examined for two-dimensional Dirac electrons in the three-quarter filled organic conductor α-(BEDT-TTF)2I3 [BEDT-TTF denotes bis(ethylenedithio)tetrathiafulvalene] under hydrostatic pressure, where the Seebeck coefficient S is proportional to the ratio of the thermoelectric conductivity L12 to the electrical conductivity L11, i.e., S = L12/TL11 with T being the temperature
-
Magnetic Phase Diagram and Skyrmions of the Hubbard Model on the β-Mn Type Lattice J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-04-04 Yoshiro Kakehashi
Magnetic phase diagram for the Hubbard model on the β-Mn type lattice has been calculated as a function of the Coulomb interaction energy parameter U and the electron number per atom n by using the generalized Hartree–Fock approximation combined with the recursion method for electronic-structure calculations. The ferromagnetic state, the ferrimagnetic state, and the helimagnetic state as well as the
-
Mottness and Spin Liquidity in a Doped Organic Superconductor κ-(BEDT-TTF)4Hg2.89Br8 J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-03-28 Hiroshi Oike, Hiromi Taniguchi, Kazuya Miyagawa, Kazushi Kanoda
It has been more than 40 years since superconductivity was discovered in organic conductors, and the way scientists view organic superconductors has changed over time. First, the fact that organic conductors exhibit superconductivity was a novelty in itself, and subsequently, it was shown that behind the superconductivity is the physics of electron correlation, which has been a focus in condensed matter
-
Field-induced Insulator–Metal Transition in EuTe2 J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-03-27 Tetsuya Takeuchi, Fuminori Honda, Dai Aoki, Yoshinori Haga, Takanori Kida, Yasuo Narumi, Masayuki Hagiwara, Koichi Kindo, Kosuke Karube, Hisatomo Harima, Yoshichika Ōnuki
We studied in detail the electrical and magnetic properties of the Eu-divalent antiferromagnet EuTe2 with a tetragonal crystal structure using single crystals grown by the Te self-flux method. The observed anisotropic magnetization curves in the antiferromagnetic state below TN = 11.1 K can be understood in terms of the magnetization processes of the two-sublattice model of an antiferromagnet with
-
Theory of Simultaneous Observation of Photoelectron and Emitted X-ray Photon in X-ray Emission Spectroscopy and Their Entanglement J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-03-27 Ryo B. Tanaka, Takayuki Uozumi
We have theoretically investigated the character of entanglement between photoelectrons and emitted X-ray photons in XEPECS process which is a coincidence spectroscopy of photoelectrons and emitted X-ray photons. In the calculations, we used a three-electron sp-model consisting of an inner-shell 1s orbital and an outer-shell 2p orbital. We found that entanglement occurs between spin of photoelectrons
-
Thermal Conductivity of Organic Solutions Against Solute Concentration J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-03-25 Kaisei Nishitani, Yutaka Moritomo
Thermal conductivity κ of organic solutions containing m mole Fe(ClO4)26.0H2O and m mole Fe(ClO4)37.1H2O was investigated against m. The dimensionless figure of merit ZT is found to be larger in methanol (MeOH) and acetone solutions than that in aqueous solution. We further found that the corrected thermal conductivity (κcor) of organic solutions linearly decreases with increase in m and interpreted
-
Generating Gradients in the Energy Landscape Using Rectified Linear Type Cost Functions for Efficiently Solving 0/1 Matrix Factorization in Simulated Annealing J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-03-21 Makiko Konoshima, Hirotaka Tamura, Yoshiyuki Kabashima
The 0/1 matrix factorization defines matrix products using logical AND and OR as product-sum operators, revealing the factors influencing various decision processes. Instances and their characteristics are arranged in rows and columns. Formulating matrix factorization as an energy minimization problem and exploring it with Simulated Annealing (SA) theoretically enables finding a minimum solution in
-
Observation of Primary Rogue Waves in Solids J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-03-19 Wei-Gang Zhao, Da-Wei Zuo, Xiu-Shu Tian, Xi-Yang Xie, Gao-Qing Meng
In this study, we first observed second-order primary rogue waves in solids by experiments using a modal based on primary waves. We found that the propagation of primary waves in solids can be described by the nonlinear Schrödinger equation. To enhance our understanding, we employed variational mode decomposition and identified the inherent frequency as the main factor. Therefore, we conducted spectral
-
Molten Salt Flux Liquid Transport Method for Ultra Clean Single Crystals UTe2 J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-03-14 Dai Aoki
Various single-crystal growth techniques have been presented for the unconventional superconductor UTe2. The molten salt flux liquid transport (MSFLT) method is employed to grow high-quality and large single crystals, exhibiting a high residual resistivity ratio (RRR ∼ 200–800). However, the Te self-flux and chemical vapor transport (CVT) methods produce samples of lower quality. The MSFLT method is
-
Revisiting the Magnetic Orders in Heisenberg Model for Tsai-Type Quasicrystal Approximant J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-03-08 Takanori Sugimoto, Shintaro Suzuki, Ryuji Tamura, Takami Tohyama
The various magnetic orders observed in approximant crystals of a Tsai-type quasicrystal are important for deepening our understanding of magnetism in quasicrystals. Using an icosahedral cluster model with intercluster interactions, we provide an intuitive explanation of the mechanism of magnetic orders previously reported by classical Monte Carlo simulations of an effective Heisenberg model for Gd-based
-
Real-Space Formulation of Topology for Disordered Rice–Mele Chains without Chiral Symmetry J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-03-04 Kiminori Hattori, Ata Yamaguchi
In this paper, we derive a real-space topological invariant that involves all energy states in the system. This global invariant, denoted by Q, is always quantized to be 0 or 1, independent of symmetries. In terms of Q, we numerically investigate topological properties of the nonchiral Rice–Mele model including random onsite potentials to show that nontrivial bulk topology is sustained for weak enough
-
Phase Transition Temperatures of a Nematic Liquid Crystal in the Presence of Noise and DC Fields J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-03-04 Jong-Hoon Huh, Takumu Higashi, Tatsuya Yamasaki, Tomoyuki Nagaya
Thermal phase transitions from a nematic liquid-crystal phase to an isotropic phase are reported in this study. The phase transition temperature Tc under noise and DC fields was examined during continuous heating processes with different heating rates R (1–10 °C/min). Tc was determined as functions of the noise intensity VN and the DC intensity V. Evidently, Tc shows different behavior with respect
-
Singlet Even-Frequency and Triplet Odd-Frequency Superconductivity in the Two-Band Hubbard Model Based on the Dynamical Mean-Field Theory J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-03-04 Yusuke Inokuma, Yoshiaki Ōno
Superconductivity in the two-band Hubbard model characterized by the on-site Coulomb repulsion Ud at d-site and the charge-transfer energy Δ between d- and p-sites is investigated on the basis of the dynamical mean-field theory. We calculate the pair susceptibilities for the s-wave symmetries with spin-singlet even-frequency and spin-triplet odd-frequency pairings and determine the superconducting
-
Thermally Driven Untethered Swimmer Using a Convection Flow with the Eddy Current Loss Due to AC Magnetic Fields J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-03-01 Hideyuki Sugioka, Ryo Takeda
Untethered microswimmers are essential for various applications. Here, we propose a thermally driven untethered swimmer using a convection flow with the eddy current loss due to AC magnetic fields and examine the performance of the swimmer. Specifically, we demonstrate that a floating object with a Cu oblique beam can be moved at a velocity of up to 1.8 mm/s by applying an AC magnetic field of 10.2
-
Numerical Renormalization Group Study of Quadrupole Kondo Effect with the Crystal-Field Excited State J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-02-29 Yuki Kaneko, Hirokazu Tsunetsugu
We have studied the quadrupolar Kondo effect for an impurity in cubic environment with taking account of a singlet excited state Γ1, which models a Pr3+ ion with a non-Kramers double ground state Γ3. We have used the numerical renormalization group approach and determined the phase diagram with varying quadrupole Kondo coupling J and Γ1 excitation energy Δ. Two phases are found and identified as local
-
Conversion of Chiral Phonons into Magnons in Ferromagnets and Antiferromagnets J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-02-28 Dapeng Yao, Shuichi Murakami
Chiral phonons with atomic rotations converted into electron spins result in a change of spin magnetizations in crystals. In this paper, we investigate a new conversion of chiral phonons into magnons both in ferromagnets and antiferromagnets by spin models with exchange and Dzyaloshinskii–Moriya interactions. The atomic rotations in chiral phonons are treated as slow phonons, which modulate spin–spin
-
Collinear Antiferromagnet SmPt6Al3 with a Sm Honeycomb Structure Centered by Pt Triangles J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-02-26 Ryohei Oishi, Yasuyuki Shimura, Kazunori Umeo, Takahiro Onimaru, Takeshi Matsumura, Mitsuru Tsukagoshi, Kenshin Kurauchi, Hiroto Nitta, Toshiro Takabatake
We report a single-crystal study on the magnetism of the Sm honeycomb compound SmPt6Al3 with the trigonal NdPt6Al3-type structure by the measurements of the magnetic susceptibility χ, electrical resistivity, specific heat, and resonant X-ray diffraction. The trivalent state of the Sm ion is indicated by the fact that the lattice parameters fall on the lanthanoid contraction lines for the R3+Pt6Al3
-
Weak Kondo Coupling Antiferromagnet CePd3Sn2 with Quasi-One-Dimensional Ce Chains J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-02-26 Yudai Kawaue, Ryohei Oishi, Chongli Yang, Rikako Yamamoto, Yasuyuki Shimura, Kazunori Umeo, Takahiro Onimaru, Devashibhai T. Adroja, Helen C. Walker, Toshiro Takabatake
CePd3Sn2 with Ce-chains along the orthorhombic b axis has been reported to order antiferromagnetically at TN ∼ 0.6 K. Above TN, the specific heat C(T) exhibits a long tail whose origin remains elusive. Here we report on the physical properties of single-crystalline samples inferred from electrical resistivity ρ(T), magnetization M(B), and C(T). The measurements reveal rather weak anisotropic properties
-
Experimental Study and Analysis of Sub-Micron Scale Air Gap Breakdown J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-02-26 Guoda Wang, Yanzhou Sun, Hao Zhang, Guokai Ma, Laijun Zhao
In order to study the mechanism of submicron-scale air gap discharge, the gas discharge experiment with electrode gap of 0.3–10 um was carried out by using nano-positioning system under atmospheric pressure. The breakdown voltages of stainless steel, brass, copper, and aluminum electrodes were measured. The experimental results are obviously deviated from the Paschen curve, and the Paschen curve cannot
-
Feasibility Study of Thin Film Surface Analysis Using Synchrotron Low-Angle Incidence Conversion Electron Mössbauer Spectroscopy J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-02-21 Takaya Mitsui, Kosuke Fujiwara, Ko Mibu, Ryo Masuda, Yasuhiro Kobayashi, Makoto Seto
A feasibility study was conducted on thin film surface analysis using conversion electron Mössbauer spectroscopy (CEMS) measured at incident angles more than the critical angle and less than several degrees, utilizing a synchrotron Mössbauer source. To identify the minimum incident angle yielding a CEMS spectrum with experimentally negligible nuclear specular reflection effects, γ-ray reflection and
-
Bayesian Integration for Hamiltonian Parameters of Crystal Field J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-02-21 Rei Nishimura, Shun Katakami, Kenji Nagata, Masaichiro Mizumaki, Masato Okada
Multidimensional measurements and a cohesive interpretation of the obtained results are imperative for comprehending the underlying mechanisms of physical phenomena. In this dissertation, we propose the utilization of Bayesian integration as a method for obtaining a consolidated interpretation of results, based on Bayesian inference. We focus on 4f electron systems, which can be comprehended through
-
Low-Lying and Core Excited Doublet States of Lithium Atom in Various Plasma Environments J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-02-19 Salah Doma, Gamal Roston, Mostafa Ahmed
New study is made for the impact of three different plasma potentials on the low-lying and core excited doublet states of the lithium atom using the variational Monte Carlo method. The considered low-lying excited doublet states include the states: 1s2ns, 1s2np, and 1s2nd, whereas the core excited states include the states: 1s n1l1n1l2 and 1s n1l1n2l2. Also, the three used plasma potentials are: screened
-
Transition of the Bifurcations in the Rotation of a Camphor-Coated Elliptical Paper Disk J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-02-15 Michiko Shimokawa, Junma Arimitsu, Hiroyuki Kitahata, Hidetsugu Sakaguchi
An elliptical camphor-coated paper disk whose center of mass is fixed at the rotational axis rotates spontaneously with a constant angular velocity when placed on the surface of water. In our experiments, we observed bifurcation by controlling the water depth, i.e., the disk rotated and was stationary at higher and lower water depths, respectively. Further, the bifurcation type depended on the aspect
-
Magnetic Order Induced by the Cooperation of Valence and Structural Instabilities in Eu1−xCaxCo2P2 J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-02-13 Kodai Moriyama, Kohei Yoshinaga, Ryoichiro Matsui, Chishiro Michioka, Hiroaki Ueda, Kazuyoshi Yoshimura
Magnetism of layered compound Eu1−xCaxCo2P2 was investigated by means of magnetization, specific heat, and electrical resistivity measurements. It is found that Eu undergoes a phase transition from a divalent state to a mixed-valence state of Eu2+δ and Eu(3−δ′)+ simultaneously with a structural transition from the uncollapsed tetragonal (ucT) phase to the collapsed tetragonal (cT) phase near x = 0
-
Effective Tight-Binding Model of Compensated Ferrimagnetic Weyl Semimetal with Spontaneous Orbital Magnetization J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-02-07 Tomonari Meguro, Akihiro Ozawa, Koji Kobayashi, Kentaro Nomura
The effective tight-binding model with compensated ferrimagnetic inverse-Heusler lattice Ti2MnAl, candidate material of magnetic Weyl semimetal, is proposed. The energy spectrum near the Fermi level, the configurations of the Weyl points, and the anomalous Hall conductivity are calculated. We found that the orbital magnetization is finite, while the total spin magnetization vanishes, at the energy
-
Deriving Quantum Spin Model for a Zigzag-Chain Ytterbium Magnet with Anisotropic Exchange Interactions J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-02-01 Hidehiro Saito, Hiroki Nakai, Chisa Hotta
We derive a quantum spin Hamiltonian of the spin-1/2 zigzag chain realized in a rare earth ytterbium-based magnetic insulator, YbCuS2. This material undergoes a transition at 0.95 K to an incommensurate magnetic phase with small moments, which does not conform to the prediction of nonmagnetic singlet ground state of the spin-1/2 Heisenberg model. We take account of octahedral crystal field effect,
-
Comparison of Spin Force and Bohm Potential Force in Laser Pulse–Magnetized Spin Plasma J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-02-01 Qiang-Lin Hu, Yan-Chao She, Wen Hu, Jin-Peng Xiao
Bohm potential and electron spin are very important quantum effects in quantum plasma. In certain circumstances, they may have important influences on the interaction of electromagnetic wave and plasma. In this paper, we make a comparison of spin force and Bohm potential force in Gaussian laser pulse–magnetized quantum plasma, and clarify which force plays the main role under different conditions.
-
General Multi-Breather, High-Order Lump and Semi-Rational Solutions of the (2 + 1)-Dimensional Mel’nikov Equation J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-01-31 Xue-Wei Yan, Yong Chen, Xiu-Bin Wang, Shou-Fu Tian
In this work, we show several types of (semi)-rational solutions for the two dimensional Mel’nikov equation. We derive multi-breather wave solutions. They present the oblique breathers, homoclinic orbits and their mixtures under two parameter constraints. We also obtain the general high-order lump solutions by employing the Schur polynomials. When internal parameters a2m+1 are large, the patterns display
-
Neutron Diffraction Study of Layered Nickelates Pr4Ni3−xCoxO8 for High-Temperature Superconductor Candidate J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-01-26 Tomonori Miyatake, Yuki Wako, Ryota Abe, Satoru Tsukamoto, Masatomo Uehara
Layered nickelate R4Ni3O8 (R = La, Pr, Nd, Sm) is a candidate for a high-temperature superconductor because its crystal structure and electronic state are very similar to high-temperature superconducting cuprates. We have performed carrier tuning by chemical substitution to Ni sites to bring the electronic states of Ni closer to that of Cu in superconducting cuprates. We aim to substitute the specific
-
Edge and Bulk States in Weyl-Orbit Quantum Hall Effect as Studied by Corbino Measurements J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-01-26 Yusuke Nakazawa, Ryosuke Kurihara, Masatoshi Miyazawa, Shinichi Nishihaya, Markus Kriener, Masashi Tokunaga, Masashi Kawasaki, Masaki Uchida
We investigate edge and bulk states in Weyl-orbit based quantum Hall effect by measuring a Corbino-type device fabricated from a topological Dirac semimetal (Cd1−xZnx)3As2 film. Clear quantum Hall plateaus are observed when measuring one-sided terminals of the Corbino-type device. This indicates that edge states of the Weyl-orbit quantum Hall effect form closed trajectories consisting of Fermi arcs
-
Superconductivity in Ternary Zirconium Telluride Zr6MTe2 with 3d Transition Metals J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-01-25 Haruka Matsumoto, Youichi Yamakawa, Ryutaro Okuma, Daisuke Nishio-Hamane, Yoshihiko Okamoto
We report the synthesis, electronic properties, and electronic states of Zr6MTe2 (M = Cr, Mn, Fe, and Co), which is isostructural to a recently discovered superconductor family Sc6MTe2. Based on the electrical resistivity and heat capacity data measured at low temperatures, Zr6FeTe2 is found to show bulk superconductivity below Tc = 0.76 K. Zr6CoTe2 also exhibited zero resistivity due to superconductivity
-
On the Role of Peeling–Ballooning Mode in Triggering the Type-I ELMs J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-01-25 Kimitaka Itoh, Kensaku Kamiya
The peeling–ballooning (P–B) mode has been thought to play an essential role in causing the type-I edge-localized modes (ELMs) in the H-mode plasmas, although firm experimental evidences of the P–B mode as a cause of Type-I ELMs have not been provided. In this letter, we examine the dynamical evolution of the P–B mode when the plasma parameters come across the linear stability boundary. It is noted
-
Seismic 1/f Fluctuations from Amplitude Modulated Earth’s Free Oscillation J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-01-24 Akika Nakamichi, Manaya Matsui, Masahiro Morikawa
We first report that the seismic time-sequence data from around the world, excluding major earthquakes, consistently yield the power spectral density inversely proportional to the frequency f. This is the 1/f fluctuation that appears ubiquitously in nature. We investigate the origin of this 1/f fluctuation based on our recent proposal: 1/f noise is amplitude modulation and demodulation. We hypothesize
-
Site-Selective NMR/NQR Study on Layered Tin Pnictide Superconductor NaSn2Pn2 (Pn = P and As) J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-01-23 Shota Nakanishi, Yusuke Nakai, Yosuke Goto, Yoshikazu Mizuguchi, Takuto Fujii, Takeshi Mito
We present the results of nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) measurements on the layered tin pnictide superconductors NaSn2As2 (the superconducting transition temperature Tc = 1.3 K) and Na1−xSn2P2 (Tc = 2.0 K). In NaSn2As2, a broad 75As NQR spectrum indicates a large charge distribution at the As site, and a broad 119Sn NMR spectrum indicates a distributed local
-
Weyl Semimetallic State in the Rashba–Hubbard Model J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-01-22 Katsunori Kubo
We investigate the Hubbard model with the Rashba spin–orbit coupling on a square lattice. The Rashba spin–orbit coupling generates two-dimensional Weyl points in the band dispersion. In a system with edges along [11] direction, zero-energy edge states appear, while no edge state exists for a system with edges along an axis direction. The zero-energy edge states with a certain momentum along the edges
-
Enhancement of Superconductivity and Structural Instability by Sn Substitution in LaO0.5F0.5BiS2 J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-01-16 Sora Kobayashi, Takeshi Hara, Kanako Noguchi, Tomoko Takeda, Ryosuke Kurihara, Atsushi Nomura, Satoshi Demura, Hiroshi Yaguchi, Hiroshi Sawa, Hideaki Sakata
Layered BiS2-based superconductor La(O,F)BiS2 can exhibit superconductivity via carrier doping, and its superconducting properties can be changed by applying hydrostatic or chemical pressure through elemental substitution. Single-crystal LaO0.5F0.5BiS2 exhibits filamentary superconductivity with Tc of approximately 3 K. We found that the partial substitution of Bi with Sn in LaO0.5F0.5BiS2 induces
-
Pressure-induced Superconductivity in BiS2-based Superconductors Eu2SrBi2S2.5Se1.5F4 J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-01-15 Kento Ishigaki, Jun Gouchi, Kiyoshi Torizuka, Sonachalam Arumugam, Ashok Kumar Ganguli, Zeba Haque, Kalaiselven Ganesan, Gohil Singh Thakur, Yoshiya Uwatoko
BiS2-based superconductor Eu2SrBi2S2.5Se1.5F4 has been investigated to clarify between Tc and crystal structure under high-pressure. The electrical resistivity by Cubic anvil cell and XRD by Diamond anvil cell were measured by generating hydrostatic pressure. In electrical resistivity measurements, Tc increased from 2.05 to 3.22 K at 1.5 GPa and decreased below 2.62 K at 3 GPa. However, under higher-pressure
-
X-ray Magnetic Circular Dichroism Arising from the Magnetic Dipole Moment in Antiferromagnets J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-01-15 Kensuke Kurita, Takashi Koretsune
We present a first-principles study of the X-ray magnetic circular dichroism (XMCD) spectra for noncollinear antiferromagnets (AFMs), Mn3Ir and Mn3Sn. By calculating the projected density of states for spin, orbital, and magnetic dipole moments, we evaluated the XMCD spectra for the AFMs. We found that the contributions of the spin magnetic moment almost vanish while those from the magnetic dipole
-
Resistivity Measurements in Palladium Hydride Film Prepared by Low-Temperature Hydrogen Absorption Method J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-01-11 Ryoma Kato, Ten-ichiro Yoshida, Riku Iimori, Tai Zizhou, Masanobu Shiga, Yuji Inagaki, Takashi Kimura, Tatsuya Kawae
We investigated the superconducting properties of a palladium hydride (PdHx; x = H/Pd) film with a thickness of ∼100 nm prepared by a low-temperature hydrogen (H) absorption method. H atoms were loaded to a Pd film in H2 gas pressure of ∼0.25 MPa at temperatures of T = 180 and 150 K. At T = 180 K, after the resistivity variation due to H absorption was almost stopped, the PdHx film was cooled rapidly
-
Numerical Simulation of Quantum Dot Interferometer in Kondo Regime J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-01-11 Yujie Zhang, Makoto Kato, Rui Sakano, Mikio Eto
We propose a numerical method to simulate a transport experiment using a quantum dot interferometer made of two quantum wires in parallel [S. Takada et al., Phys. Rev. Lett. 113, 126601 (2014)]. The wires are partly tunnel-coupled to each other to form a mesoscopic ring with an embedded quantum dot. Our method consists of two stages. In the first stage, we represent the experimental system with a tight-binding
-
Sublattice-Selective Inverse Faraday Effect in Ferrimagnetic Rare-Earth Iron Garnet J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2024-01-10 Toshiki Hiraoka, Ryo Kainuma, Keita Matsumoto, Kihiro T. Yamada, Takuya Satoh
We performed time-resolved pump–probe measurements using rare-earth iron garnet Gd3/2Yb1/2BiFe5O12 as a two-sublattice ferrimagnet. We measured the initial phases of the magnetic resonance modes below and above the magnetization compensation temperature to clarify the sublattice selectivity of the inverse Faraday effect in ferrimagnets. A comparison of the time evolution of magnetization estimated
-
Superconductivity in Ternary Germanide ScPdGe and Silicide ScPdSi J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2023-12-22 Yusaku Shinoda, Yoshihiko Okamoto, Youichi Yamakawa, Hiroshi Takatsu, Hiroshi Kageyama, Daigorou Hirai, Koshi Takenaka
The electronic properties of ScPdGe and ScPdSi, crystallizing in the hexagonal ZrNiAl and orthorhombic TiNiSi structures, respectively, are investigated. ScPdGe and ScPdSi are found to show bulk superconductivity below 0.9 and 1.7 K, respectively, based on electrical resistivity and heat capacity data measured using synthesized polycrystalline samples. First-principles calculations indicate the presence
-
Single Crystal Growth and Transport Properties of van der Waals Materials ABTe4 (A/B = Ti, Zr, Hf) J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2023-12-19 Yuto Hasuo, Takahiro Urata, Masaaki Araidai, Yuji Tsuchiya, Satoshi Awaji, Hiroshi Ikuta
Monolayers of ABTe4 (A/B = Ti, Zr, Hf) were theoretically predicted to be two-dimensional topological insulators, but little has been known about the physical properties of these compounds. Here, we report on the single crystal growth, bulk transport properties, and band structure calculations of these compounds. The magnetotransport properties indicate that all three compounds are multi-carrier systems
-
Local- and Intermediate-range Partial Structure Study of As–Se Glasses J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2023-12-19 Shinya Hosokawa, Jens Rüdiger Stellhorn, Nathalie Boudet, Nils Blanc, Eisuke Magome, László Pusztai, Shinji Kohara, Kazutaka Ikeda, Toshiya Otomo
To investigate the relationship between the partial structures and the stiffness transition in AsxSe1−x glasses, anomalous X-ray scattering (AXS) and X-ray and neutron diffraction (XRD and ND) experiments were carried out. For the AXS experiments, anomalous terms near the absorption edges were experimentally obtained instead of the theoretical values with large ambiguities. The results were analyzed
-
New Wave Behaviors Generated by Simple Equation Method with Riccati Equation of Some Fourth-Order Fractional Water Wave Equations J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2023-12-19 Weerachai Thadee, Sirasrete Phoosree
More real situations have been rendered as nonlinear fractional partial differential equations (nfPDEs), which is why the seeking of the exact traveling wave solutions and studying the wave behavior of these equations are very important in many fields of mathematical physics. The nonlinear space-time fractional Ablowitz–Kaup–Newell–Segur (AKNS) equation and the nonlinear space-time fractional Este
-
Theory of Hall Conductivity and Its Exact Relationship to Orbital Magnetic Susceptibility J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2023-12-15 Masao Ogata
A new formula for Hall conductivity is derived in terms of retarded and advanced Green’s functions. It contains transport and thermodynamic contributions and the latter is shown to be closely related to the orbital magnetic susceptibility. The physical interpretation of this relationship is clarified. By studying the Hall coefficient, it is also shown that the thermodynamic contribution becomes dominant
-
Unusual Magnetism in a d-Electron Compound Fe(OH)Cl: A X–Y Stacked-Triangular Antiferromagnet with Characteristic Double-Bridge Bonding, Unquenched Orbital Moment and Coexisting Spin Fluctuations J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2023-12-14 Xu-Guang Zheng, Md. Mahbubur Rahman Bhuiyan, Ichihiro Yamauchi, Masayoshi Fujihala, Kunihisa Sugimoto, Tatsuya Kawae, Toru Ishigaki
Single crystals of triangular-lattice Fe(OH)Cl in orthorhombic structure were synthesized and its magnetism was studied thoroughly using multiple magnetic probes of magnetization, muon spin rotation/relaxation (μSR) and neutron diffraction. Antiferromagnetic transition was found at TN = 13.3 K together with slow dynamics and surprisingly unquenched orbital moments in the paramagnetic state. Residual
-
Unique Band Structure of Pressure Induced Semiconducting State in SmS Characterized by 33S-Nuclear Magnetic Resonance Measurements J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2023-12-13 Shogo Yoshida, Hajime Ueda, Tetsuya Mutou, Shun Katakami, Masato Okada, Yuichi Yokoyama, Masaichiro Mizumaki, Naoka Hiraoka, Kentaro Kitagawa, Yoshinori Haga, Takuto Fujii, Yusuke Nakai, Takeshi Mito
In Kondo insulators, where a small energy gap evolves only at low temperatures, it is challenging to experimentally clarify their electronic structures, especially under high pressure. In this study, we have carried out high-pressure 33S-nuclear magnetic resonance measurements on a pressure-induced semiconducting phase with a small energy gap of SmS. To analyze the recovery curve of nuclear spin–lattice
-
Theory of Spin-Acoustic Resonance for Spin-3/2 Si Vacancy with C3[math] Site Symmetry in Silicon Carbide J. Phys. Soc. Jpn. (IF 1.7) Pub Date : 2023-12-12 Mikito Koga, Masashige Matsumoto
Motivated by the recent acoustically driven spin resonance studies applied to silicon vacancy centers in silicon carbide, we theoretically investigate the spin–strain interaction characterized by the defect spin-3/2 quadrupole components coupled to strain fields. Considering the C3v symmetry of the vacancy site beyond the spherical approximation, we clarify the effect of a deviation from the spherical