FieldsElectronic transport 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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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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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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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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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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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
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Spin-Wave Dynamics in Antiferromagnets under Electric Current
2021-12-28
Electric current causes a Doppler effect in spin waves in ferromagnets through a spin-transfer torque. We report that antiferromagnets allow two such spin-transfer torques and present a microscopic analysis that interpolates ferro- and antiferromagnetic transport regimes.
Electronic transport in condensed matter
Magnetic properties in condensed matter
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Materials with Dirac Loops: A Potential Solution for Next-generation Electronics
2021-10-14
A high-quality single crystal of rhenium oxide shows significantly large magnetoresistance, potentially originating from a unique electronic structure called “hourglass Dirac chain” protected by the symmetry of the crystal.
Electronic transport in condensed matter
Electron states in condensed matter
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PICKUP
Measurements and Implications of Shot Noise in Mesoscopic Systems
2021-9-29
Shot noise measurements provide rewarding insights into system properties, non-equilibrium phenomena, and quantum effects in mesoscopic systems.
Electronic transport in condensed matter
Magnetic properties in condensed matter
Superconductivity
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Exploring the Thermoelectric Properties of Nitrogen-doped Carbon Nanotubes
2021-9-29
A semiconducting carbon nanotube doped with an optimal concentration of nitrogen delivered a thermoelectric power substantially higher than that delivered by commercial Bi2Te3 alloys.
Electronic transport 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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Finding Pattern in Randomness: Brownian Motion of Skyrmions
2021-9-7
The chiral properties of the Brownian motion of magnetic skyrmions in one- and two-dimensional systems in thermal equilibrium are reported.
Structure and mechanical and thermal properties in condensed matter
Electronic transport in condensed matter
Magnetic properties in condensed matter
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Nonlinear Thermoelectric Transport Will Open a New and Exotic Way to Detect Topological Nature of Dirac Electrons in Solids
2021-8-25
Recently, it was proposed that a novel nonlinear anomalous Ettingshausen effect enabled a new and exotic approach to observe topological nature of Dirac electrons in solids using thermoelectric properties.
Electronic transport in condensed matter
Electronic structure and electrical properties of surfaces and nanostructures
Structure and mechanical and thermal properties in condensed matter
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Semiconductor to Semimetal to Superconductor: An Excitonic Journey
2021-8-16
A phase diagram was constructed for Ta2NiSe5, a promising candidate for excitonic insulators, using high pressure as a tuning parameter. The results indicated pressure-induced superconductivity in the semimetallic phase.
Superconductivity
Electronic transport in condensed matter
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Exploring the Physics of Ferrimagnets for Future Spintronics Applications
2021-8-6
This Special Topics collection of the Journal of the Physical Society of Japan covers recent progress in spintronics research on ferrimagnetic materials.
Structure and mechanical and thermal properties in condensed matter
Electronic transport in condensed matter
Magnetic properties in condensed matter
Cross-disciplinary physics and related areas of science and technology
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PICKUP
Overlooked Materials Host Rich Physics of Strongly Correlated Electrons
2021-7-2
An international team of researchers reviews the research progress on strongly spin-orbit coupled systems, providing an overview of theoretically predicted electronic phases, candidate materials, and unusual experimental observations.
Electron states in condensed matter
Magnetic properties in condensed matter
Electronic transport in condensed matter
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How a Potentially Novel Effect Converts AC Current into DC Heat Flow
2021-5-24
A novel current-induced thermoelectric phenomenon, the nonlinear anomalous Ettingshausen effect, was discussed. As an example, the weak charge ordering state in an organic conductor α-(BEDT-TTF)2I3 was focused on. This effect generates a transverse heat current with rectifying characteristics, namely unidirectionality even under AC fields.
Electronic transport in condensed matter
Electronic structure and electrical properties of surfaces and nanostructures
Structure and mechanical and thermal properties in condensed matter
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PICKUP
Random Numbers Can Help Solve Difficult Problems in Many-body Physics
2021-3-29
Theorists review a random state vector-based description of quantum many-body systems which helps greatly reduce the computational burden involved in their numerical simulations, opening doors to applications in quantum computing.
Mathematical methods, classical and quantum physics, relativity, gravitation, numerical simulation, computational modeling
Electronic transport in condensed matter
Magnetic properties in condensed matter
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No Mass Gap Phase Transition in Novel Massless Dirac Fermion Material
2021-3-22
Using an organic massless Dirac fermion system, we found that massless Dirac fermions undergo a quantum phase transition without creating any mass gap even in the strong coupling regime.
Electron states in condensed matter
Electronic transport in condensed matter
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What Dictates Nonlinear Behavior in Strongly Correlated Insulators?
2021-3-3
The nonlinear conduction (the deviation from Ohm's law) has been discovered universally in various correlated materials. This may be explained by the percolation conduction in disordered materials.
Electronic transport in condensed matter
Statistical physics and thermodynamics