JournalJPSJ

NEWChiral Gauge Field and Topological Magnetoelectric Response in Fully SpinPolarized Magnetic Weyl Semimetal Co3Sn2S2
2024111
This study clarifies the relationship between magnetic ordering and chiral gauge fields in the ferromagnetic Weyl semimetal Co_{3}Sn_{2}S_{2}, highlighting its spintronic potential using the topological magnetoelectric responses of Weyl fermions.
Electronic transport in condensed matter
Magnetic properties in condensed matter

NEWFermi Machine — Quantum ManyBody Solver Derived from Mapping between Noninteracting and Strongly Correlated Fermions
20241029
Strongly interacting quantum manybody states can be mapped to noninteracting quantum states, enabling a new quantum neural network called the Fermi machine to solve strongly correlated electron problems.Electron states in condensed matter
Measurement, instrumentation, and techniques

NEWElectricity Provides Cooling
20241015
Electric cooling at low temperatures is successfully achieved using a ferroelectric ferromagnetic solid instead of refrigerant gases such as fluorocarbons.Crossdisciplinary physics and related areas of science and technology
Magnetic properties in condensed matter
Structure and mechanical and thermal properties in condensed matter

SingleCrystal Growth of a Cuprate Superconductor with the Highest Critical Temperature
2024520
Millimetersized single crystals of a trilayer cuprate superconductor (Hg,Re)Ba_{2}Ca_{2}Cu_{3}O_{8+δ} that exhibits the highest superconducting transition temperature under ambient pressure, were grown reproducibly and safely.Superconductivity

A Neural Thermometer for Predicting Phase Transitions of Unknown Systems
2024911
A novel convolutional neural network predicts phase transition temperatures from spin configurations without prior information about order parameters, paving the way for the discovery of new materials in condensed matter physics.
Measurement, instrumentation, and techniques
Statistical physics and thermodynamics

PressureTuned Classical–Quantum Crossover in Magnetic FieldInduced Quantum Phase Transitions of a TriangularLattice Antiferromagnet
202495
The correspondence principle states that as quantum numbers approach infinity, the nature of a system described by quantum mechanics should match that described by classical mechanics. Quantum phenomena, such as quantum superposition and quantum correlation, generally become unobservable when a system approaches this regime. Conversely, as quantum numbers decrease, classical descriptions give way to observable quantum effects. The external approach to classical–quantum crossover has attracted research interest. This study aims to demonstrate a method for achieving such control in materials.
Crossdisciplinary physics and related areas of science and technology
Electron states in condensed matter
Magnetic properties in condensed matter

Discovery of LightInduced Mirror Symmetry Breaking
202492
The authors discovered the lightinduced mirror symmetry breaking, paving the way for controlling mirror symmetries via light and for realizing various phenomena utilizing the mirror symmetry breaking.
Dielectric, optical, and other properties in condensed matter
Electronic transport in condensed matter

PICKUPThe Mysterious Superconductivity of Sr2RuO4
2024822
Researchers review the recent advancements made towards solving the mysteries of the unconventional superconductivity of Sr_{2}RuO_{4}, analyzing recent experiments and theoretical models and proposing approaches to resolve current challenges.
Superconductivity

Discovery of Unconventional PressureInduced Superconductivity in CrAs
2024813
A new study has discovered pressureinduced superconductivity in the helimagnet CrAs, originating in the vicinity of the helimagnetic ordering, representing the first example of superconductivity in Crbased magnetic systems.
Electronic transport in condensed matter
Superconductivity

Unification of Spin Helicity in the Magnetic Skyrmion Lattice of EuNiGe3
202487
In the magnetic skyrmion lattice of noncentrosymmetric EuNiGe_{3}, the original magnetic helicity, determined by the antisymmetric exchange interaction, is reversed, resulting in a unified helicity.
Magnetic properties in condensed matter

Having a Good Friend around Makes Life Better
2024729
It is true that having a good friend around makes life better, and this idea is also true in the quantum world.Crossdisciplinary physics and related areas of science and technology

Antiferromagnetism Induces Dissipationless Transverse Conductivity
2024724
An investigation using highquality NbMnP crystals demonstrates that the anomalous Hall conductivity arising from antiferromagnetism is dissipationless, as expected from the intrinsic mechanism.
Electronic structure and electrical properties of surfaces and nanostructures
Electronic transport in condensed matter
Magnetic properties in condensed matter

d^{2} Trimer and d^{3} Tetramer in a Pyrochlore Lattice
2024711
Based on the charge disproportionation of V^{3+} and V^{2+}, the V^{3+}(d^{2}) trimers and V^{2+}(d^{3}) tetramers in the vanadium pyrochlore lattice of AlV_{2}O_{4} are described by the orbitallyinduced Peierls mechanism.
Dielectric, optical, and other properties in condensed matter
Electron states in condensed matter

Structural Rotation and Falsely Chiral Antiferromagnetism: A New Combination Generating Ferrotoroidic State
202474
The ferrotoroidic state, an exotic state of matter with broken space inversion and timereversal symmetries, was achieved by combining structural rotation and falsely chiral antiferromagnetism in PbMn_{2}Ni_{6}Te_{3}O_{18}.
Dielectric, optical, and other properties in condensed matter
Magnetic properties in condensed matter

PICKUPUnderstanding Electronic Ordering and Cross Correlations with Multipole Representation
2024612
This study reviews the recent advancements in research of multipole representations for understanding electronic orderings and crosscorrelations in materials and presents future research directions.
Magnetic properties in condensed matter

Evaluation of the Exchange Stiffness Constants of Itinerant Magnets from the FirstPrinciples Calculations
202465
Using firstprinciples calculations, we evaluated the exchange stiffness constants of ferromagnetic metals at finite temperatures. The constants can be used as parameters in the Landau–Lifshitz–Gilbert equation.
Electron states in condensed matter
Structure and mechanical and thermal properties in condensed matter

Microscopic Exploration of Electronic States in Nickelate Superconductors
2024531
The multilayered nickelates, La_{3}Ni_{2}O_{7} and La_{4}Ni_{3}O_{10} , were investigated using nuclear magnetic resonance (NMR) at ambient pressure. Metallic electronic states under the density wave order were observed microscopically for both compounds.
Magnetic properties in condensed matter
Superconductivity

Solving a Stochastic Differential Equation is Solving a MeanField Quantum Spin System
2024516
The replica method maps matrixvalued geometric Brownian motion to a meanfield quantum spin system. This correspondence makes it possible to obtain an exact solution for matrixvalued geometric Brownian motion.
Magnetic properties in condensed matter
Mathematical methods, classical and quantum physics, relativity, gravitation, numerical simulation, computational modeling
Statistical physics and thermodynamics

Cooking in Salt for UltraClean Superconductor UTe_{2}
2024430
A new crystal growth technique, the molten salt flux liquid transport method, was developed to produce highquality single crystals of spintriplet superconductor UTe_{2}. This method is promising for exploring the exotic superconductivity of other materials.
Superconductivity

PICKUPExploring Electronic States in BEDTTTF Organic Superconductors
2024424
This review, published in the Journal of the Physical Society of Japan, provides a comprehensive summary of the electronic states observed in BEDTTTF type organic superconductors, including metalinsulator transitions, Mottness transitions, nonFermi liquids, quantum spin liquids, and BoseEinstein condensation.
Electronic transport in condensed matter
Magnetic properties in condensed matter
Superconductivity

Conversion of Chiral Phonons into Magnons in Magnets
202441
A new phenomenon involving the conversion of chiral phonons into magnons is theoretically predicted. The effective magnetic field induced by chiral phonons causes a change in the spin magnetization of magnets.
Electronic transport in condensed matter

Which is Moving?—Pinning Down the Origin of Fluctuations in Muon Spin Relaxation—
2024328
The study demonstrated that we can distinguish between the diffusion motion of the muon itself and the motion of the surrounding ions in muon spin relaxation.
Crossdisciplinary physics and related areas of science and technology
Structure and mechanical and thermal properties in condensed matter

Variety of Mechanically Induced Spin Currents in Rashba Systems
2024322
Various types of spin currents, including unconventional types, are generated in Rashba spinorbit coupled systems by dynamic lattice distortions associated with, for example, surface acoustic waves.
Electronic transport in condensed matter
Magnetic properties in condensed matter
Structure and mechanical and thermal properties in condensed matter

What Determines the Sign of Spin Current? ~ Theoretical Study of Spin Seebeck Effect in Antiferromagnetic Insulators
2024318
We developed a microscopic theory for the spin Seebeck effect in antiferromagnets, that explains the sign reversal of the spin current at the spinflop transition point and describes the sorts of dominant carriers.
Electronic transport in condensed matter

Chiral Anomalies in Organic Dirac Semimetals
202425
A threedimensional massless Dirac fermion system exhibiting broken chiral symmetry was successfully realized in organic conductor α(BEDTTTF)_{2}I_{3} under high pressures. Our study detected the chiral anomalyinduced negative magnetoresistance and planar Hall effects and opened new avenues for further advancements in the field.
Electronic transport in condensed matter

Relation between MeanField Theory and Atomic Structures in Chalcogenide Glasses
202421
The authors conducted various of Xray and neutron scattering experiments on typical chalcogenide glasses and clarified the relationship between the atomic structure and simple rigidity percolation theory.
Structure and mechanical and thermal properties in condensed matter

Thermodynamic Property of a CMOS Device beyond Landauer Limit
2024123
Focusing on a CMOS NAND GATE operating in a subthreshold region, the thermodynamic cost of computation was analyzed in relation to input/output voltages surpassing the Landauer limit.
Crossdisciplinary physics and related areas of science and technology
Electronic transport in condensed matter
Statistical physics and thermodynamics

Current Melt Frozen Electrons
2024115
The origin of the currentinduced insulatortometal transition of samarium monosulfide was explained by the 4f−5d hybridization observed using optical reflectivity and photoelectron spectroscopies.
Dielectric, optical, and other properties in condensed matter
Magnetic properties in condensed matter

Towards Uncovering the Hidden Order of URu_{2}Si_{2} Phase Transition
2024111
We propose a chiral charge as the hidden order parameter in URu_{2}Si_{2} and present experiments to detect it by focusing on breakings of mirror and inversion symmetries at the local uranium ion.
Electronic structure and electrical properties of surfaces and nanostructures
Magnetic properties in condensed matter

Possible Origin of High Thermoelectric Power Factor in Ultrathin FeSe: A Twoband Model
20231221
The high thermoelectric power factor observed in ultrathin FeSe can be theoretically explained by a twoband model with chemical potential between upper and lower band bottoms.
Crossdisciplinary physics and related areas of science and technology
Electronic structure and electrical properties of surfaces and nanostructures
Structure and mechanical and thermal properties in condensed matter

Quantum Dripping of Superfluid ^{4}He
20231215
Superfluid ^{4}He droplets exhibit robustly quantized dripping periods despite gradually varying input flow rates owing to their high amplitude and undamped oscillation.Electromagnetism, optics, acoustics, heat transfer, and classical and fluid mechanics
Structure and mechanical and thermal properties in condensed matter

OneWay Optical Waveguide Realized by Edge Modes of Topological Photonic Crystals
20231212
A oneway optical waveguide was realized on the boundary between two types of photonic crystals with different topological properties, which were demonstrated by highresolution infrared reflection measurements.
Dielectric, optical, and other properties in condensed matter
Electromagnetism, optics, acoustics, heat transfer, and classical and fluid mechanics

PICKUPExploring Recent Advances in the Physics of Biofluid Locomotion
2023128
This Special Topics Edition of the JPSJ describes the latest advances in the field of biofluid locomotion, shedding light on the underlying physics behind the movement of organisms that swim and fly.
Crossdisciplinary physics and related areas of science and technology
Electromagnetism, optics, acoustics, heat transfer, and classical and fluid mechanics
Mathematical methods, classical and quantum physics, relativity, gravitation, numerical simulation, computational modeling
Measurement, instrumentation, and techniques
Statistical physics and thermodynamics
Structure and mechanical and thermal properties in condensed matter

Magnetic Excitation in S = 1/2 Antiferromagnetic Chain CsCoCl_{3 }with IsingLike Exchange Interaction
20231113
The results of highfield electron spin resonance measurements in the millimeterwave to terahertz region reveal unconventional magnetic excitation in S = 1/2 onedimensional antiferromagnets.
Magnetic properties in condensed matter

Strange Elastic Anomalies with Ultraslow Dynamics around Magnetic Critical Endpoint
2023112
Near the magnetic critical endpoint of UCoAl, peculiar elastic anomalies exhibiting exotic ultraslow dynamics arising from electric quadrupoles are indicated. Combining this with diverse fluctuations, intriguing phenomena and exotic ground states are expected.
Magnetic properties in condensed matter
Structure and mechanical and thermal properties in condensed matter

A New Superconductor Family with Various Magnetic Elements
20231027
A new superconductor family, Sc_{6}MTe_{2}, has been discovered, comprising seven variations with magnetic elements labeled as M. Notably, only a few known superconductor families exist that involve various magnetic elements.
Crossdisciplinary physics and related areas of science and technology
Electron states in condensed matter
Superconductivity

Study of Unconventional Slow Critical Dynamics of the Frustrated Magnet DyRu_{2}Si_{2}
~Spontaneous Alignment of Emergent Ferromagnetic Spin Textures?~
20231017
We measured the ac susceptibility of the frustrated magnet DyRu_{2}Si_{2}, in the partially ordered phase, where emergent 2dimensional (2D) disordered planes appear, and revealed extraordinarily slow and unconventional dynamics, which could be attributed to the highly fluctuating nature of the emergent 2D planes.
Magnetic properties in condensed matter

PICKUP
Dzyaloshinskii–Moriya Interactions in Magnetism, Electricity, and Electronics
20231012
A collection of papers in the Journal of the Physical Society of Japan advances our understanding of Dzyaloshinskii–Moriya interaction and paves the way for developing next generation computing and electronic systems.
Dielectric, optical, and other properties in condensed matter
Electron states in condensed matter
Magnetic properties in condensed matter

Antisymmetric Exchange Interaction Selects the Cycloidal Helicity: Observation by Resonant Xray Diffraction
202395
The unique sense of rotation of the cycloidal magnetic order was clarified in noncentrosymmetric EuIrGe_{3} by using circularly polarized resonant xray diffraction.
Magnetic properties in condensed matter

How Many Excitons Can Combine?
2023831
Quantum diffusion Monte Carlo simulation demonstrated the formation of polyexcitons in twodimensional multivalley semiconductor systems, where all exciton pairs were energetically bound by equalstrength “chemical bonds.”
Dielectric, optical, and other properties in condensed matter
Electronic structure and electrical properties of surfaces and nanostructures

Exploring Vortex Dynamics in a Multiband Superconductor
2023822
We measured the microwave fluxflow Hall effect in FeSe, where the cancellation of holes and electrons was observed. This is a novel effect of multiband superconductors.
Superconductivity

Toward Accurate Diamond Quantum Sensing
2023816
A systematic investigation of the optical power dependence of the response of diamond quantum sensors provides valuable guidelines for accurate magnetic field measurements.
Dielectric, optical, and other properties in condensed matter

Topological Properties of the Periodic Toda Lattice: Analogy with the Thouless Pump
202388
We find that the periodic Toda lattice belongs to the same topological class as the Thouless pump.
Electronic structure and electrical properties of surfaces and nanostructures
Mathematical methods, classical and quantum physics, relativity, gravitation, numerical simulation, computational modeling

Double Superconductivity in Nodal Line Material NaAlSi; Coexistence of Bulk and 2D Superconductivities
2023726
Unique diamagnetic torque signals are found in the nodal line material NaAlSi, which suggests the presence of double superconductivity; i.e., bulk superconductivity and 2D superconductivity on the crystal surface.
Electronic structure and electrical properties of surfaces and nanostructures
Superconductivity

PICKUPSelfEnergy Singularity Explains HighTemperature Superconductivity in Cuprates
2023718
A new review discusses the hightemperature superconductivity mechanisms in copper oxides, explaining the various phases observed in these materials based on a nonperturbative effect called selfenergy singularity.
Electron states in condensed matter
Superconductivity

PICKUPGeometryBased Nonlinear and Nonequilibrium Phenomena in Solids
2023710
Researchers from The University of Tokyo have recently reviewed geometric aspects of nonlinear and nonequilibrium optical phenomena for advanced materials applications in novel solar panels, photodetectors, diodes, and quantum computing.
Dielectric, optical, and other properties in condensed matter
Electronic structure and electrical properties of surfaces and nanostructures
Electronic transport in condensed matter

Ultra Purification Unveils the Intrinsic Nature in SpinTriplet Superconductor UTe_{2}
202375
Microscopic spinsusceptibility measurements in ultrapure UTe_{2} samples reveal that superconducting symmetry is analogous to the superfluidity of the ^{3}He Bphase and that U deficiency has a significant impact on superconducting properties.
Magnetic properties in condensed matter
Superconductivity

ElectronHole Asymmetry Observed in Photoinduced Phase Transition of Excitonic Insulators
2023614
During a photoinduced phase transition from an excitonic insulator to a semimetal, photoinduced energy shift of its hole band is delayed than that of its electron band indicating electronhole asymmetry.
Dielectric, optical, and other properties in condensed matter
Electronic structure and electrical properties of surfaces and nanostructures

Quantum Hall Effect in Bulk (Multilayered) Organic Crystal
202366
The multilayer quantum Hall effect is discovered in an organic massless Dirac electron system, α(BETS)_{2}I_{3} under pressure at low temperatures and a magnetic field of approximately 1 T.
Electronic structure and electrical properties of surfaces and nanostructures
Electronic transport in condensed matter

Fingerprint of Majorana Zero Modes through Nonlocal Measurements
2023523
The enhancement and robustness of the 2π periodic AharonovBohm effect can serve as a nonlocal probe of Majorana zero modes in topological superconductors that are not restricted by fermion parity.
Superconductivity