JournalJPSJ

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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

NEW
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

SpinOrbit Coupled Electrons on Kagome Lattice Give Rise to Various Magnetic Orderings
2022810
Diverse magnetic orderings are found to be produced by spinorbit coupled electrons on the kagome lattice. This finding provides a unified guiding principle for the design of magnetic topological materials.
Electronic structure and electrical properties of surfaces and nanostructures

A New Route to the Realization of Topological Superconductivity
202281
We theoretically suggest that topological Weyl superconductivity can be realized by applying a supercurrent to noncentrosymmetric linenodal superconductors with spin–orbit coupling.
Superconductivity
Electronic structure and electrical properties of surfaces and nanostructures

Exploring Superconductivity in the Close Proximity of PolarNonpolar Structural Phase Transition
2022726
A polarnonpolar structural phase transition and corresponding increase in superconducting transition temperature T_{c }are observed in chemically doped PtBi_{2}. T_{c} increases as the system approaches the phase boundary.
Superconductivity

Giant Vortices of Fish: Mechanisms and Patterns
2022712
The origin of giant rotating clusters of fish is revealed by a new agentbased model that incorporates the topological nature of interactions and the escape response characteristic to fish.
Crossdisciplinary physics and related areas of science and technology

Origin of Metamagnetic Transition (MMT) in the SpinTriplet Superconductivity in UTe_{2}
202274
Stateoftheart magnetostriction measurements in a pulsedmagnetic field reveal the origin of a metamagnetic transition of spintriplet superconductor UTe_{2}. We propose that the uranium valence fluctuation plays a crucial role in its metamagnetic and superconducting transitions.
Superconductivity
Magnetic properties in condensed matter

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Unraveling the Unique Properties of Icosahedral Quasicrystals
2022628
Scientists review the magnetism, nonFermi liquid behavior, and quantum critical behavior observed in icosahedral quasicrystals (QCs), and compare these properties with that of heavy fermions and approximant crystals.
Magnetic properties in condensed matter
Structure and mechanical and thermal properties in condensed matter
Crossdisciplinary physics and related areas of science and technology

New Chiral Molecular Ferroelectrics
2022614
A new chiral ferroelectric material is discovered in a purely organic system, 1,1’bi2naphthol・2 dimethyl sulfoxide (BINOL・2DMSO).
Dielectric, optical, and other properties in condensed matter

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Tensor Networks Across Physics
202267
Researchers from Japan provide the first comprehensive review of the historical development of tensor networks from a statistical mechanics viewpoint, with a focus on its theoretical background.
Mathematical methods, classical and quantum physics, relativity, gravitation, numerical simulation, computational modeling
Statistical physics and thermodynamics
Magnetic properties in condensed matter

Towards Radionuclide Cancer Therapy with High Purity ^{177}Lu from Enriched ^{176}Yb Samples
202263
A method was developed to estimate the isotopic compositions of enriched ^{176}Yb sample required for producing radionuclide ^{177}Lu used for cancer therapy, with high radionuclide purity in accelerators.
Nuclear physics
Crossdisciplinary physics and related areas of science and technology

Understanding Relaxor Ferroelectrics with Simple Landau Theory
2022523
Thirdorder nonlinear dielectric susceptibility is measured in the paraelectric phase of Pb(Sc_{1/2}Ta_{1/2})O_{3}. The linear and nonlinear dielectric susceptibility results can be consistently explained based on the Landautype freeenergy density.
Dielectric, optical, and other properties in condensed matter
Structure and mechanical and thermal properties in condensed matter
Crossdisciplinary physics and related areas of science and technology

Spin Transport in a TwoDimensional Tilted Dirac Electron System
2022413
We propose that spin current in an organic conductor, α(BETS)_{2}I_{3}, is an appropriate physical quantity to detect the topological nature of the material whose electrons obey a quasitwodimensional Dirac equation.
Electronic transport in condensed matter
Electronic structure and electrical properties of surfaces and nanostructures

Violation of FluctuationDissipation Theorem Results in Robustness of Fluctuation Against Localization
2022323
We study equilibrium current fluctuations in systems without timereversal symmetry, violating the fluctuationdissipation theorem. Notably, the offdiagonal fluctuation is insensitive to system imperfections in contrast to other fluctuations and conductivity.
Statistical physics and thermodynamics
Electronic transport in condensed matter
Electronic structure and electrical properties of surfaces and nanostructures

FourDimensional XY Quantum Phase Transition in Superfluid Helium4
2022318
Liquid helium confined in nanopores exhibits a quantum superfluid transition at absolute zero. Investigations have revealed that the quantum nature also dominates the finitetemperature superfluid transition, obeying a simple meanfield theory.
Structure and mechanical and thermal properties in condensed matter

Topological Aspects of a Nonlinear System: The Dimerized Toda Lattice
2022316
A nonlinear topological phase is shown to emerge in the dimerized Toda lattice. It is experimentally detectable by measuring the voltage propagation in electric circuits.
Electronic structure and electrical properties of surfaces and nanostructures
Electronic transport in condensed matter