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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.
Statistical physics and thermodynamics
Electronic transport in condensed matter
Crossdisciplinary physics and related areas of science and technology

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.
Magnetic properties in condensed matter
Electronic structure and electrical properties of surfaces and nanostructures

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.
Electronic structure and electrical properties of surfaces and nanostructures
Structure and mechanical and thermal properties in condensed matter
Crossdisciplinary physics and related areas of science and technology

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.

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.
Electromagnetism, optics, acoustics, heat transfer, and classical and fluid mechanics
Dielectric, optical, and other properties in condensed matter

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Exploring 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.
Measurement, instrumentation, and techniques
Crossdisciplinary physics and related areas of science and technology
Electromagnetism, optics, acoustics, heat transfer, and classical and fluid mechanics
Statistical physics and thermodynamics
Mathematical methods, classical and quantum physics, relativity, gravitation, numerical simulation, computational modeling
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.
Structure and mechanical and thermal properties in condensed matter
Magnetic 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.
Superconductivity
Crossdisciplinary physics and related areas of science and technology
Electron states in condensed matter

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

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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.
Magnetic properties in condensed matter
Electron states in condensed matter
Dielectric, optical, and other 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.
Mathematical methods, classical and quantum physics, relativity, gravitation, numerical simulation, computational modeling
Electronic structure and electrical properties of surfaces and nanostructures

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.
Superconductivity
Electronic structure and electrical properties of surfaces and nanostructures

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SelfEnergy 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.
Superconductivity
Electron states in condensed matter

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GeometryBased 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.
Electronic structure and electrical properties of surfaces and nanostructures
Dielectric, optical, and other properties in condensed matter
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.
Superconductivity
Magnetic properties in condensed matter

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

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Microswimmer Hydrodynamics Through the Lens of Jeffery’s Orbits
2023518
This review article summarizes the latest progress on Jeffery’s orbits and how they relate to the motion of microswimmers of various shapes, including sperms, bacteria, and even microrobots.
Electromagnetism, optics, acoustics, heat transfer, and classical and fluid mechanics
Crossdisciplinary physics and related areas of science and technology

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Towards a New Phase in Materials Science with Hyperordered Structures
202351
A Special Topics edition of the Journal of the Physical Society of Japan features articles discussing recent advancements in hyperordered structures in materials, their applications, and the techniques for observing them.
Structure and mechanical and thermal properties in condensed matter
Crossdisciplinary physics and related areas of science and technology
Dielectric, optical, and other properties in condensed matter
Electron states in condensed matter
Atomic and molecular physics
Mathematical methods, classical and quantum physics, relativity, gravitation, numerical simulation, computational modeling

Heavy Fermion Meets Antiferromagnetic Sea
2023418
CeMnSi exhibits heavy fermion behaviors in an antiferromagnetically ordered state of Mn.
The spacetime inversion symmetry inherent in the ordered state is key for the unique electron state.Magnetic properties in condensed matter

Possible New State in CeB_{6 }Uncovered by Extremely LowFrequency Nuclear Quadrupole Resonance Experiments
202343
Extremely lowfrequency nuclear quadrupole resonance analyses of CeB_{6}, a prototypical antiferroquadrupole (AFQ) material, indicate the possible existence of a new state in the zerofield AFQ ordered phase.
Magnetic properties in condensed matter

What Determines NonNewtonian Flow Behavior in GlassForming Liquids?
2023320
Even minute structural changes can lead to significant reductions in the flow resistances of glassforming liquids. Here, possible scenarios and predictions for two different classes of glassforming liquids are provided.
Crossdisciplinary physics and related areas of science and technology
Structure and mechanical and thermal properties in condensed matter

Clockwise or Anticlockwise, That is the Question: Phonons with Angular Momentum in Chiral Crystals
202337
Chiral crystals have lattice structures with no mirror or inversion symmetries.
A few basic questions about their unique phonon excitations with intrinsic angular momentum are answered.Structure and mechanical and thermal properties in condensed matter

Hidden Magnetoelectric Phase Transition by Emergent Staggered Magnetic Field
2023217
Emergent staggered magnetic fields induce phase transition in the multiferroic material Ba_{2}FeSi_{2}O_{7}.
This study established a design principle utilizing emergent staggered magnetic fields to obtain an enhanced physical response.Magnetic properties in condensed matter

AngleResolved Photoelectron Spectroscopy Microscopy: A Tool to Accelerate Nanomaterials Research
2023210
Researchers have published a practical guide on new uses of photoelectron microscopy combined with valence band dispersion analysis. They visualized severalmicrometerswide graphite facets and precisely characterized the band structure.
Electronic structure and electrical properties of surfaces and nanostructures
Structure and mechanical and thermal properties in condensed matter
Crossdisciplinary physics and related areas of science and technology

Powered by Machine Learning: Obtaining Spectral Conductivity and Chemical Potential of Thermoelectric Materials from Experimental Data
2023131
We propose a machinelearning method to obtain the fundamental physical quantity, namely, the spectral conductivity, from experimental data of thermoelectric coefficients. Our study introduces a new datadriven approach that reveals the underlying lowenergy electronic states of highperformance thermoelectric materials.
Structure and mechanical and thermal properties in condensed matter

NetPattern of Muskmelon Rind Favors a Common Mathematical Law
2023112
The surface of muskmelon is covered with a fine meshlike netpattern. The geometric features of the fine mesh appear unique for each individual, but hide an unexpected mathematical rule.
Crossdisciplinary physics and related areas of science and technology
Statistical physics and thermodynamics

ThicknessDependent Oscillation Behavior of Magnetic Phase Transitions in Pt Ultrathin Films with Small Orbital Moment
202316
Ferromagnetism in nanoPt films originates from the quantumconfinement effect that depends on film thickness. Studies of the electronic states of nanoPt will aid in developing methods for efficiently utilizing its large spinorbit coupling.
Magnetic properties in condensed matter

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Phonon Simulations and Its Applications
20221226
Computation of phonons using first principles has many applications for understanding crystal properties. This review provides an overview of the present capabilities of such simulations using finite displacement supercell approach.
Structure and mechanical and thermal properties in condensed matter

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High Magnetic Field as a Tool for Discovery in Condensed Matter Physics
20221213
The Journal of the Physical Society of Japan highlights in this special topic recent advances in modern physics that have been realized with the generation of pulsed high magnetic fields.
Magnetic properties in condensed matter
Dielectric, optical, and other properties in condensed matter
Electronic transport in condensed matter
Structure and mechanical and thermal properties in condensed matter
Electron states in condensed matter
Electronic structure and electrical properties of surfaces and nanostructures
Measurement, instrumentation, and techniques

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Terahertz Radiation as a Tool for Exploring Material Properties
2022128
Researchers from Japan highlight, in a recent review, the range of material properties that can be and have been studied using the phenomenon of femtosecond laserinduced terahertz radiation emission.
Dielectric, optical, and other properties in condensed matter

Insights into the Overlooked Electric FerroAxial Ordering
2022121
We theoretically demonstrate spin related conductivity under electric ferroaxial ordering. We show an intrinsic generation of a spin current parallel to an applied electric field in metals and insulators.

Understanding the Obscure Antiferromagnetism in αMn by Nuclear Magnetic Resonance
20221129
Although Mn is an elementary metal, the antiferromagnetic state of αMn is still obscure. Our NMR study on highquality αMn provides new insights into the symmetry of its antiferromagnetism.
Magnetic properties in condensed matter

Observing the de Haas–van Alphen Effect to Unveil the Electronic Structure of UTe_{2} Superconductor
20221116
The topology of Fermi surfaces with heavy effective masses in strongly correlated topological superconductor UTe_{2 }was investigated using quantum oscillation measurements and theoretical calculations.
Electron states in condensed matter
Superconductivity

Strange Metal Behavior Potentially Associated to Hidden Electronic Nematicity
20221110
Ironbased superconductor, Ba_{1x}Rb_{x}Fe_{2}As_{2}, exhibits “strange metal” behavior—linear dependence of resistivity on temperature. It seems that hidden electronic nematic fluctuations play a greater role than the wellknown antiferromagnetic fluctuations.
Superconductivity
Electronic transport in condensed matter

Thermoelectric Response in Strongly Disordered Systems
2022117
Based on the Kubo–Luttinger linear response theory, we discovered that the lowT Seebeck coefficient for Mott variablerange hopping in a ddimensional system varies as S ∝ T^{d}^{/(d+1)}, which is different from the conventional S ∝ T^{(}^{d}^{−1)/(}^{d}^{+1)}. In addition, the experimental data for S of CuCrTiS_{4} at low T are in excellent agreement with our prediction S ∝ T^{3/4} (d = 3).
Electronic transport in condensed matter

Birefringence ImagingBased Investigation of StressInduced Phase Transitions in SrTiO_{3}
20221027
The spatial distributions of ferroelectric and structural phase transitions in quantum paraelectric SrTiO_{3} under uniaxial stress were microscopically observed using birefringence imaging techniques.
Dielectric, optical, and other properties in condensed matter

TopologyBased Method for Determining the Order Parameter of the Putative SpinTriplet Superconductor UTe_{2}
2022929
The intrinsic anomalous thermal Hall effect can be an effective probe for the order parameters of nonunitary pairing states of the putative spintriplet superconductor UTe_{2}
Superconductivity

Inertial Focusing of Red Blood Cells in Square Tube Flows
202298
Red blood cells flowing through square capillary tubes were observed to migrate towards four points located on the diagonal in the tube crosssection, owing to their deformability and inertia.
Electromagnetism, optics, acoustics, heat transfer, and classical and fluid mechanics

Can a NodeLess Wave Function Have Higher Energy than NodeFull Ones?
202296
“The energy level of an electron state increases as the number of nodes in its wave function increases.” The preceding statement, often found in textbooks, was challenged by our largescale DFT (densityfunctional theory) calculations performed for the decavacancy in Si crystal.
Electron states in condensed matter
Structure and mechanical and thermal properties in condensed matter

Optical Tweezer Arrays with Ytterbium Atoms for Studying Quantum Phenomena
2022824
A neutral Rydberg atom tweezer array is a promising platform for quantum computation. In this study, featuring its metastable excited state, an array of single ytterbium atoms trapped in microoptical tweezers was constructed. This overcomes many problems in conventional systems using alkali atoms.
Atomic and molecular physics