FieldsElectronic structure and electrical properties of surfaces and nanostructures
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Antiferromagnetism Induces Dissipationless Transverse Conductivity
2024-7-24
An investigation using high-quality NbMnP crystals demonstrates that the anomalous Hall conductivity arising from antiferromagnetism is dissipationless, as expected from the intrinsic mechanism.
Electronic structure and electrical properties of surfaces and nanostructures
Electronic transport 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.
Electronic structure and electrical properties of surfaces and nanostructures
Magnetic properties in condensed matter
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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.
Cross-disciplinary physics and related areas of science and technology
Electronic structure and electrical properties of surfaces and nanostructures
Structure and mechanical and thermal 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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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.
Electronic structure and electrical properties of surfaces and nanostructures
Mathematical methods, classical and quantum physics, relativity, gravitation, numerical simulation, computational modeling
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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.
Electronic structure and electrical properties of surfaces and nanostructures
Superconductivity
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PICKUPGeometry-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.
Dielectric, optical, and other properties in condensed matter
Electronic structure and electrical properties of surfaces and nanostructures
Electronic transport 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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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.
Cross-disciplinary physics and related areas of science and technology
Electronic structure and electrical properties of surfaces and nanostructures
Structure and mechanical and thermal properties in condensed matter
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PICKUPHigh 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.
Dielectric, optical, and other properties in condensed matter
Electron states in condensed matter
Electronic structure and electrical properties of surfaces and nanostructures
Electronic transport in condensed matter
Magnetic properties in condensed matter
Measurement, instrumentation, and techniques
Structure and mechanical and thermal properties in condensed matter
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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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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.
Electronic structure and electrical properties of surfaces and nanostructures
Superconductivity
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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 structure and electrical properties of surfaces and nanostructures
Electronic transport in condensed matter
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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.
Electronic structure and electrical properties of surfaces and nanostructures
Electronic transport in condensed matter
Statistical physics and thermodynamics
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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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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.
Electron states 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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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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Analyzing Photoinduced Phase Transitions in an Organic Salt Using Floquet Theory
2021-11-5
Rich nonequilibrium phase diagrams, including photoinduced topological insulator phases, were theoretically predicted for an organic salt α-(BEDT-TTF)2I3 when irradiated by elliptically polarized light.Dielectric, optical, and other properties in condensed matter
Electronic structure and electrical properties of surfaces and nanostructures
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Electronic Structure Transformation in a Magnetized Topological Semimetal
2021-10-6
We theoretically show that the nodal structures in topological semimetals, including Weyl points and nodal lines, can be switched by magnetic orders, accompanied by localized states at magnetic domain walls.
Electronic structure and electrical properties of surfaces and nanostructures
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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 structure and electrical properties of surfaces and nanostructures
Electronic transport in condensed matter
Structure and mechanical and thermal properties 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 structure and electrical properties of surfaces and nanostructures
Electronic transport in condensed matter
Structure and mechanical and thermal properties in condensed matter
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Magnetic Responses of Majorana Kramers Pairs on Time-Reversal Invariant Topological Superconductors
2021-3-3
We reveal magnetic degrees of freedom of Majorana fermions and find a new type of response that are distinct from those of conventional electrons.Electronic structure and electrical properties of surfaces and nanostructures
Superconductivity