JournalJPSJ
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NEW PICKUP
Exploring Electronic States in BEDT-TTF Organic Superconductors
2024-4-24
This review, published in the Journal of the Physical Society of Japan, provides a comprehensive summary of the electronic states observed in BEDT-TTF type organic superconductors, including metal-insulator transitions, Mottness transitions, non-Fermi liquids, quantum spin liquids, and Bose-Einstein condensation.
Superconductivity
Electronic transport in condensed matter
Magnetic properties in condensed matter
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NEW
Conversion of Chiral Phonons into Magnons in Magnets
2024-4-1
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
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NEW
Which is Moving?—Pinning Down the Origin of Fluctuations in Muon Spin Relaxation—
2024-3-28
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.
Structure and mechanical and thermal properties in condensed matter
Cross-disciplinary physics and related areas of science and technology
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Variety of Mechanically Induced Spin Currents in Rashba Systems
2024-3-22
Various types of spin currents, including unconventional types, are generated in Rashba spin-orbit 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
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What Determines the Sign of Spin Current? ~ Theoretical Study of Spin Seebeck Effect in Antiferromagnetic Insulators
2024-3-18
We developed a microscopic theory for the spin Seebeck effect in antiferromagnets, that explains the sign reversal of the spin current at the spin-flop transition point and describes the sorts of dominant carriers.
Electronic transport in condensed matter
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Chiral Anomalies in Organic Dirac Semimetals
2024-2-5
A three-dimensional massless Dirac fermion system exhibiting broken chiral symmetry was successfully realized in organic conductor α-(BEDT-TTF)2I3 under high pressures. Our study detected the chiral anomaly-induced negative magnetoresistance and planar Hall effects and opened new avenues for further advancements in the field.
Electronic transport in condensed matter
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Relation between Mean-Field Theory and Atomic Structures in Chalcogenide Glasses
2024-2-1
The authors conducted various of X-ray 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
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Thermodynamic Property of a CMOS Device beyond Landauer Limit
2024-1-23
Focusing on a CMOS NAND GATE operating in a sub-threshold 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
Cross-disciplinary physics and related areas of science and technology
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Current Melt Frozen Electrons
2024-1-15
The origin of the current-induced insulator-to-metal 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
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Towards Uncovering the Hidden Order of URu2Si2 Phase Transition
2024-1-11
We propose a chiral charge as the hidden order parameter in URu2Si2 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
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Possible Origin of High Thermoelectric Power Factor in Ultrathin FeSe: A Two-band Model
2023-12-21
The high thermoelectric power factor observed in ultrathin FeSe can be theoretically explained by a two-band 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
Cross-disciplinary physics and related areas of science and technology
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Quantum Dripping of Superfluid 4He
2023-12-15
Superfluid 4He droplets exhibit robustly quantized dripping periods despite gradually varying input flow rates owing to their high amplitude and undamped oscillation.
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One-Way Optical Waveguide Realized by Edge Modes of Topological Photonic Crystals
2023-12-12
A one-way optical waveguide was realized on the boundary between two types of photonic crystals with different topological properties, which were demonstrated by high-resolution 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
2023-12-8
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
Cross-disciplinary 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
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Magnetic Excitation in S = 1/2 Antiferromagnetic Chain CsCoCl3 with Ising-Like Exchange Interaction
2023-11-13
The results of high-field electron spin resonance measurements in the millimeter-wave to terahertz region reveal unconventional magnetic excitation in S = 1/2 one-dimensional antiferromagnets.
Magnetic properties in condensed matter
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Strange Elastic Anomalies with Ultraslow Dynamics around Magnetic Critical Endpoint
2023-11-2
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
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A New Superconductor Family with Various Magnetic Elements
2023-10-27
A new superconductor family, Sc6MTe2, 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
Cross-disciplinary physics and related areas of science and technology
Electron states in condensed matter
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Study of Unconventional Slow Critical Dynamics of the Frustrated Magnet DyRu2Si2 ~Spontaneous Alignment of Emergent Ferromagnetic Spin Textures?~
2023-10-17
We measured the ac susceptibility of the frustrated magnet DyRu2Si2, in the partially ordered phase, where emergent 2-dimensional (2-D) disordered planes appear, and revealed extraordinarily slow and unconventional dynamics, which could be attributed to the highly fluctuating nature of the emergent 2-D planes.
Magnetic properties in condensed matter
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Dzyaloshinskii–Moriya Interactions in Magnetism, Electricity, and Electronics
2023-10-12
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
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Antisymmetric Exchange Interaction Selects the Cycloidal Helicity: Observation by Resonant X-ray Diffraction
2023-9-5
The unique sense of rotation of the cycloidal magnetic order was clarified in noncentrosymmetric EuIrGe3 by using circularly polarized resonant x-ray diffraction.
Magnetic properties in condensed matter
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How Many Excitons Can Combine?
2023-8-31
Quantum diffusion Monte Carlo simulation demonstrated the formation of polyexcitons in two-dimensional multi-valley semiconductor systems, where all exciton pairs were energetically bound by equal-strength “chemical bonds.”
Dielectric, optical, and other properties in condensed matter
Electronic structure and electrical properties of surfaces and nanostructures
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Exploring Vortex Dynamics in a Multi-band Superconductor
2023-8-22
We measured the microwave flux-flow Hall effect in FeSe, where the cancellation of holes and electrons was observed. This is a novel effect of multi-band superconductors.
Superconductivity
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Toward Accurate Diamond Quantum Sensing
2023-8-16
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
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Topological Properties of the Periodic Toda Lattice: Analogy with the Thouless Pump
2023-8-8
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
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Double Superconductivity in Nodal Line Material NaAlSi; Coexistence of Bulk and 2D Superconductivities
2023-7-26
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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Self-Energy Singularity Explains High-Temperature Superconductivity in Cuprates
2023-7-18
A new review discusses the high-temperature superconductivity mechanisms in copper oxides, explaining the various phases observed in these materials based on a nonperturbative effect called self-energy singularity.
Superconductivity
Electron states in condensed matter
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Geometry-Based Nonlinear and Nonequilibrium Phenomena in Solids
2023-7-10
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
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Ultra Purification Unveils the Intrinsic Nature in Spin-Triplet Superconductor UTe2
2023-7-5
Microscopic spin-susceptibility measurements in ultra-pure UTe2 samples reveal that superconducting symmetry is analogous to the superfluidity of the 3He B-phase and that U deficiency has a significant impact on superconducting properties.
Superconductivity
Magnetic properties in condensed matter
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Electron-Hole Asymmetry Observed in Photoinduced Phase Transition of Excitonic Insulators
2023-6-14
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 electron-hole asymmetry.
Dielectric, optical, and other properties in condensed matter
Electronic structure and electrical properties of surfaces and nanostructures
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Quantum Hall Effect in Bulk (Multilayered) Organic Crystal
2023-6-6
The multilayer quantum Hall effect is discovered in an organic massless Dirac electron system, α-(BETS)2I3 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
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Fingerprint of Majorana Zero Modes through Nonlocal Measurements
2023-5-23
The enhancement and robustness of the 2π periodic Aharonov-Bohm 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
2023-5-18
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
Cross-disciplinary physics and related areas of science and technology
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Towards a New Phase in Materials Science with Hyperordered Structures
2023-5-1
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
Cross-disciplinary 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
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Heavy Fermion Meets Antiferromagnetic Sea
2023-4-18
CeMnSi exhibits heavy fermion behaviors in an antiferromagnetically ordered state of Mn.
The space-time inversion symmetry inherent in the ordered state is key for the unique electron state.Magnetic properties in condensed matter
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Possible New State in CeB6 Uncovered by Extremely Low-Frequency Nuclear Quadrupole Resonance Experiments
2023-4-3
Extremely low-frequency nuclear quadrupole resonance analyses of CeB6, a prototypical antiferroquadrupole (AFQ) material, indicate the possible existence of a new state in the zero-field AFQ ordered phase.
Magnetic properties in condensed matter
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What Determines Non-Newtonian Flow Behavior in Glass-Forming Liquids?
2023-3-20
Even minute structural changes can lead to significant reductions in the flow resistances of glass-forming liquids. Here, possible scenarios and predictions for two different classes of glass-forming liquids are provided.
Cross-disciplinary physics and related areas of science and technology
Structure and mechanical and thermal properties in condensed matter
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Clockwise or Anticlockwise, That is the Question: Phonons with Angular Momentum in Chiral Crystals
2023-3-7
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
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Hidden Magnetoelectric Phase Transition by Emergent Staggered Magnetic Field
2023-2-17
Emergent staggered magnetic fields induce phase transition in the multiferroic material Ba2FeSi2O7.
This study established a design principle utilizing emergent staggered magnetic fields to obtain an enhanced physical response.Magnetic properties in condensed matter
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Angle-Resolved Photoelectron Spectroscopy Microscopy: A Tool to Accelerate Nanomaterials Research
2023-2-10
Researchers have published a practical guide on new uses of photoelectron microscopy combined with valence band dispersion analysis. They visualized several-micrometers-wide 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
Cross-disciplinary physics and related areas of science and technology
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Powered by Machine Learning: Obtaining Spectral Conductivity and Chemical Potential of Thermoelectric Materials from Experimental Data
2023-1-31
We propose a machine-learning method to obtain the fundamental physical quantity, namely, the spectral conductivity, from experimental data of thermoelectric coefficients. Our study introduces a new data-driven approach that reveals the underlying low-energy electronic states of high-performance thermoelectric materials.
Structure and mechanical and thermal properties in condensed matter
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Net-Pattern of Muskmelon Rind Favors a Common Mathematical Law
2023-1-12
The surface of muskmelon is covered with a fine mesh-like net-pattern. The geometric features of the fine mesh appear unique for each individual, but hide an unexpected mathematical rule.
Cross-disciplinary physics and related areas of science and technology
Statistical physics and thermodynamics
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Thickness-Dependent Oscillation Behavior of Magnetic Phase Transitions in Pt Ultrathin Films with Small Orbital Moment
2023-1-6
Ferromagnetism in nano-Pt films originates from the quantum-confinement effect that depends on film thickness. Studies of the electronic states of nano-Pt will aid in developing methods for efficiently utilizing its large spin-orbit coupling.
Magnetic properties in condensed matter
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Phonon Simulations and Its Applications
2022-12-26
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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PICKUP
High Magnetic Field as a Tool for Discovery in Condensed Matter Physics
2022-12-13
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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PICKUP
Terahertz Radiation as a Tool for Exploring Material Properties
2022-12-8
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 laser-induced terahertz radiation emission.
Dielectric, optical, and other properties in condensed matter
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Insights into the Overlooked Electric Ferro-Axial Ordering
2022-12-1
We theoretically demonstrate spin related conductivity under electric ferro-axial ordering. We show an intrinsic generation of a spin current parallel to an applied electric field in metals and insulators.
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Understanding the Obscure Antiferromagnetism in α-Mn by Nuclear Magnetic Resonance
2022-11-29
Although Mn is an elementary metal, the antiferromagnetic state of α-Mn is still obscure. Our NMR study on high-quality α-Mn provides new insights into the symmetry of its antiferromagnetism.
Magnetic properties in condensed matter
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Observing the de Haas–van Alphen Effect to Unveil the Electronic Structure of UTe2 Superconductor
2022-11-16
The topology of Fermi surfaces with heavy effective masses in strongly correlated topological superconductor UTe2 was investigated using quantum oscillation measurements and theoretical calculations.
Electron states in condensed matter
Superconductivity
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Strange Metal Behavior Potentially Associated to Hidden Electronic Nematicity
2022-11-10
Iron-based superconductor, Ba1-xRbxFe2As2, exhibits “strange metal” behavior—linear dependence of resistivity on temperature. It seems that hidden electronic nematic fluctuations play a greater role than the well-known antiferromagnetic fluctuations.
Superconductivity
Electronic transport in condensed matter
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Thermoelectric Response in Strongly Disordered Systems
2022-11-7
Based on the Kubo–Luttinger linear response theory, we discovered that the low-T Seebeck coefficient for Mott variable-range hopping in a d-dimensional system varies as S ∝ Td/(d+1), which is different from the conventional S ∝ T(d−1)/(d+1). In addition, the experimental data for S of CuCrTiS4 at low T are in excellent agreement with our prediction S ∝ T3/4 (d = 3).
Electronic transport in condensed matter