Year2022
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PICKUP
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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Theoretical Assessment of F-wave Bottom Mesons and Their Properties
2022-11-24
We use heavy quark effective theory to study F-wave bottom mesons. Using theory and experimental data, we calculate their masses and analyze their decay widths to estimate the upper bound to the associated couplings.
Theoretical Particle Physics
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PICKUP
Towards a Better Understanding of the Short-range Repulsive Nuclear Force
2022-11-21
In a new study, researchers provide an experimental estimate of the short-range repulsive nuclear force strength based on a high-statistics measurement of the differential cross-section for Σ+p scattering.
Nuclear physics
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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
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Representations of KBc Algebra for Generating String Field Theory Solutions
2022-10-31
We propose a general method for generating solutions in string field theory from a solution constructed using KBc algebra, and reproduce known solutions constructed earlier using different methods.
Theoretical Particle Physics
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Birefringence Imaging-Based Investigation of Stress-Induced Phase Transitions in SrTiO3
2022-10-27
The spatial distributions of ferroelectric and structural phase transitions in quantum paraelectric SrTiO3 under uniaxial stress were microscopically observed using birefringence imaging techniques.
Dielectric, optical, and other properties in condensed matter
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Topology-Based Method for Determining the Order Parameter of the Putative Spin-Triplet Superconductor UTe2
2022-9-29
The intrinsic anomalous thermal Hall effect can be an effective probe for the order parameters of non-unitary pairing states of the putative spin-triplet superconductor UTe2
Superconductivity
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Inertial Focusing of Red Blood Cells in Square Tube Flows
2022-9-8
Red blood cells flowing through square capillary tubes were observed to migrate towards four points located on the diagonal in the tube cross-section, owing to their deformability and inertia.
Electromagnetism, optics, acoustics, heat transfer, and classical and fluid mechanics
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Can a Node-Less Wave Function Have Higher Energy than Node-Full Ones?
2022-9-6
“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 large-scale DFT (density-functional theory) calculations performed for the decavacancy in Si crystal.
Electron states in condensed matter
Structure and mechanical and thermal properties in condensed matter
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Optical Tweezer Arrays with Ytterbium Atoms for Studying Quantum Phenomena
2022-8-24
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 micro-optical tweezers was constructed. This overcomes many problems in conventional systems using alkali atoms.
Atomic and molecular physics
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Spin-Orbit Coupled Electrons on Kagome Lattice Give Rise to Various Magnetic Orderings
2022-8-10
Diverse magnetic orderings are found to be produced by spin-orbit 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
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PICKUP
Open String Field Theory Beyond Feynman Diagrams
2022-8-9
Theoretical physicists propose an alternative way of performing perturbative calculations in an open string field theory that has no analogy in the standard quantum field theory formalism.
Elementary particles, fields, and strings
Theoretical Particle Physics
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A New Route to the Realization of Topological Superconductivity
2022-8-1
We theoretically suggest that topological Weyl superconductivity can be realized by applying a supercurrent to noncentrosymmetric line-nodal superconductors with spin–orbit coupling.
Superconductivity
Electronic structure and electrical properties of surfaces and nanostructures
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Exploring Superconductivity in the Close Proximity of Polar-Nonpolar Structural Phase Transition
2022-7-26
A polar-nonpolar structural phase transition and corresponding increase in superconducting transition temperature Tc are observed in chemically doped PtBi2. Tc increases as the system approaches the phase boundary.
Superconductivity
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PTEP SPECIAL SECTION
New Phases of Matter: Topological Physics in the 21st Century
2022-7-19
Researchers from Japan highlight in an editorial our current understanding of topological phases of matter, focusing on the classification of the newly discovered symmetry protected topological phases.
Theoretical Particle Physics
Fundamental Theory of Condensed Matter Physics, Statistical Mechanics, Fluid Dynamics,
Superconductivity
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Giant Vortices of Fish: Mechanisms and Patterns
2022-7-12
The origin of giant rotating clusters of fish is revealed by a new agent-based model that incorporates the topological nature of interactions and the escape response characteristic to fish.
Cross-disciplinary physics and related areas of science and technology
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PICKUP
Calculating Impedances for a Particle Accelerator
2022-7-7
In a new study, scientists provide a more comprehensive picture of dealing with the impedances of a two-dimensional conductive cylindrical beam pipe with walls of finite thickness and space-charge forces simultaneously.
Beam Physics
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Origin of Metamagnetic Transition (MMT) in the Spin-Triplet Superconductivity in UTe2
2022-7-4
State-of-the-art magnetostriction measurements in a pulsed-magnetic field reveal the origin of a metamagnetic transition of spin-triplet superconductor UTe2. 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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PICKUP
Unraveling the Unique Properties of Icosahedral Quasicrystals
2022-6-28
Scientists review the magnetism, non-Fermi 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
Cross-disciplinary physics and related areas of science and technology
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PICKUP
Testing the Viability of Muon Accelerators
2022-6-21
Researchers demonstrate the viability of a radio-frequency linear accelerator to accelerate stopped muons to the speed of light.
Experimental Particle Physics
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New Chiral Molecular Ferroelectrics
2022-6-14
A new chiral ferroelectric material is discovered in a purely organic system, 1,1’-bi-2-naphthol・2 dimethyl sulfoxide (BINOL・2DMSO).
Dielectric, optical, and other properties in condensed matter
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PICKUP
Tensor Networks Across Physics
2022-6-7
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
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Towards Radionuclide Cancer Therapy with High Purity 177Lu from Enriched 176Yb Samples
2022-6-3
A method was developed to estimate the isotopic compositions of enriched 176Yb sample required for producing radionuclide 177Lu used for cancer therapy, with high radionuclide purity in accelerators.
Nuclear physics
Cross-disciplinary physics and related areas of science and technology
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Simulating Strongly Coupled Quantum Field Theory with Quantum Algorithms
2022-5-27
Nonperturbative quantum field theory problems can often be difficult to solve with classical algorithms. Researchers now develop quantum computing algorithms to understand such problems in the Hamiltonian formalism.
Theoretical Particle Physics
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Understanding Relaxor Ferroelectrics with Simple Landau Theory
2022-5-23
Third-order nonlinear dielectric susceptibility is measured in the paraelectric phase of Pb(Sc1/2Ta1/2)O3. The linear and nonlinear dielectric susceptibility results can be consistently explained based on the Landau-type free-energy density.
Dielectric, optical, and other properties in condensed matter
Structure and mechanical and thermal properties in condensed matter
Cross-disciplinary physics and related areas of science and technology
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Getting Around the Sign Problem to Solve an Open Quantum System
2022-5-18
Researchers from Japan have found a novel non-equilibrium quantum system that doesn’t have the sign problem. The transport properties of the system are simulated with a Monte Carlo approach.
Elementary particles, fields, and strings
Theoretical Particle Physics
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PICKUP
Quantum Anomaly in a Dirac Fermion System with Spacetime Dependent Mass
2022-4-27
Scientists investigate quantum anomalies in a system of Dirac fermions with spacetime dependent mass and show that the anomaly formulas can be expressed in terms of superconnections.
Theoretical Particle Physics
Elementary particles, fields, and strings
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Spin Transport in a Two-Dimensional Tilted Dirac Electron System
2022-4-13
We propose that spin current in an organic conductor, α-(BETS)2I3, is an appropriate physical quantity to detect the topological nature of the material whose electrons obey a quasi-two-dimensional Dirac equation.
Electronic transport in condensed matter
Electronic structure and electrical properties of surfaces and nanostructures
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Violation of Fluctuation-Dissipation Theorem Results in Robustness of Fluctuation Against Localization
2022-3-23
We study equilibrium current fluctuations in systems without time-reversal symmetry, violating the fluctuation-dissipation theorem. Notably, the off-diagonal 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
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Four-Dimensional XY Quantum Phase Transition in Superfluid Helium-4
2022-3-18
Liquid helium confined in nanopores exhibits a quantum superfluid transition at absolute zero. Investigations have revealed that the quantum nature also dominates the finite-temperature superfluid transition, obeying a simple mean-field theory.
Structure and mechanical and thermal properties in condensed matter
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Topological Aspects of a Nonlinear System: The Dimerized Toda Lattice
2022-3-16
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
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Unusual Nonlinear Conductivity in Charge-Ordered α-(BEDT-TTF)2I3
2022-3-9
Unusual nonlinear conduction is detected in organic molecular salt α-(BEDT-TTF)2I3. The observed third-order nonlinear conductivity implies a quadrupole instability hidden in this charge-ordered organic salt.
Electronic transport in condensed matter
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Economic Irreversibility: The Universal Guiding Principle of Infection Control
2022-3-1
It is preferable to avoid lockdowns, as lockdowns at seriously spread phases are very expensive. It would be economically better to utilize less intense countermeasures as early as possible to avoid lockdowns in later phases.
Statistical physics and thermodynamics
Cross-disciplinary physics and related areas of science and technology
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High-Precision Observation of Cosmic Gamma-ray Sources with the GRAINE Telescope
2022-2-24
A gamma-ray telescope developed jointly by universities in Japan promises an unprecedented imaging resolution that could help distinguish gamma-ray sources observed in our galaxy.
Measurement, instrumentation, and techniques
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Calculating Superconformal Index of 𝓝 = 4 Super-Yang-Mills Theory for Finite N
2022-2-22
The examination of AdS/CFT correspondence for finite N, where quantum gravitational effects become important, reveals that finite N corrections for the superconformal index can be reproduced as D-3 brane contributions.
Theoretical Particle Physics
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Realizing Spin Liquids Experimentally with Kapellasite-type Quantum Kagome Antiferromagnet
2022-2-10
This study reports the observation of the spin fluctuation in a quantum kagome antiferromagnet CaCu3(OH)6Cl2·0.6H2O which persists down to 82 mK using the μSR technique.
Magnetic properties in condensed matter
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Phosphorous-Based Zintl Compounds as Viable Semimetals
2022-2-4
A black-phosphorus-derived Zintl compound, MoP4, is obtained by high-pressure synthesis. The material exhibits a non-quadratic large magnetoresistance and semi-metallic Seebeck behavior, as predicted by the first principles calculations yielding massive and non-symmorphic Dirac semimetal states.
Electronic structure and electrical properties of surfaces and nanostructures
Structure and mechanical and thermal properties in condensed matter
Electron states in condensed matter
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New Systematic Analysis Method of Identifying Microscopic Essential Couplings
2022-1-31
We propose a systematic method of identifying essential model parameters for nonlinear response tensors. The analysis results reveal fundamental couplings in nontrivial responses and promote further development of multiferroic responses.
Electronic transport in condensed matter
Dielectric, optical, and other properties in condensed matter
Cross-disciplinary physics and related areas of science and technology
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Shedding Light on Nonreciprocal Directional Dichroism at High Magnetic Fields in a Multiferroic Material
2022-1-19
Large optical nonreciprocal directional dichroism, coupled with an antiferromagnetic order parameter, is observed in a high magnetic field via magneto-optical spectroscopy combined with a pulse magnet technique.
Dielectric, optical, and other properties in condensed matter
Magnetic properties in condensed matter
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Twist in the Tale: Exploring the Dielectric Screening Effect in Twisted Bilayer Graphene
2022-1-12
Although the screening of an external electric field, strongly influences the electronic states of two-dimensional material stack, it is not well understood. Magnetotransport measurements of twisted double bilayer graphene uncovered the screening of atomic layers.
Electronic structure and electrical properties of surfaces and nanostructures
Electronic transport in condensed matter