FieldsCross-disciplinary physics and related areas of science and technology

Electricity Provides Cooling

Electric cooling at low temperatures is successfully achieved using a ferroelectric ferromagnetic solid instead of refrigerant gases such as fluorocarbons.

Magnetic properties in condensed matter

Structure and mechanical and thermal properties in condensed matter

Cross-disciplinary physics and related areas of science and technology

Pressure-Tuned Classical–Quantum Crossover in Magnetic Field-Induced Quantum Phase Transitions of a Triangular-Lattice Antiferromagnet

The correspondence principle states that as quantum numbers approach infinity, the nature of a system described by quantum mechanics should match that described by classical mechanics. Quantum phenomena, such as quantum superposition and quantum correlation, generally become unobservable when a system approaches this regime. Conversely, as quantum numbers decrease, classical descriptions give way to observable quantum effects. The external approach to classical–quantum crossover has attracted research interest. This study aims to demonstrate a method for achieving such control in materials.

Magnetic properties in condensed matter

Electron states in condensed matter

Cross-disciplinary physics and related areas of science and technology

Having a Good Friend around Makes Life Better

It is true that having a good friend around makes life better, and this idea is also true in the quantum world.

Cross-disciplinary physics and related areas of science and technology

Which is Moving?—Pinning Down the Origin of Fluctuations in Muon Spin Relaxation—

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

Thermodynamic Property of a CMOS Device beyond Landauer Limit

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

Possible Origin of High Thermoelectric Power Factor in Ultrathin FeSe: A Two-band Model

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

Exploring Recent Advances in the Physics of Biofluid Locomotion

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

A New Superconductor Family with Various Magnetic Elements

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

Microswimmer Hydrodynamics Through the Lens of Jeffery’s Orbits

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

Towards a New Phase in Materials Science with Hyperordered Structures

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

What Determines Non-Newtonian Flow Behavior in Glass-Forming Liquids?

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

Angle-Resolved Photoelectron Spectroscopy Microscopy: A Tool to Accelerate Nanomaterials Research

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

Net-Pattern of Muskmelon Rind Favors a Common Mathematical Law

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

Giant Vortices of Fish: Mechanisms and Patterns

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

Unraveling the Unique Properties of Icosahedral Quasicrystals

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

Towards Radionuclide Cancer Therapy with High Purity ¹⁷⁷Lu from Enriched ¹⁷⁶Yb Samples

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

Understanding Relaxor Ferroelectrics with Simple Landau Theory

Third-order nonlinear dielectric susceptibility is measured in the paraelectric phase of Pb(Sc_1/2Ta_1/2)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

Economic Irreversibility: The Universal Guiding Principle of Infection Control

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

New Systematic Analysis Method of Identifying Microscopic Essential Couplings

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

Exploring the Thermoelectric Properties of Nitrogen-doped Carbon Nanotubes

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

Exploring the Physics of Ferrimagnets for Future Spintronics Applications

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

BKT Phase Transitions in Magnetic Systems: Formations of Narrow Stripes and Vortex–Antivortex Pairs in a Quasi-2D Ferromagnet K₂CuF₄

Cryogenic Lorentz transmission electron microscopy directly shows that vortex and antivortex pairs emerge in a quasi-two-dimensional ferromagnet K₂CuF₄. This work may reveal the nature of Berezinskii, Kosterlitz, and Thouless phase transition in a magnetic system.

Magnetic properties in condensed matter

Structure and mechanical and thermal properties in condensed matter

Cross-disciplinary physics and related areas of science and technology

Hybrid Quantum–Classical Algorithms: At the Verge of Useful Quantum Computing

Scientists discuss the recent progress in algorithms that have enabled hybrid quantum–classical computers, which has brought the quest to realize useful quantum computing much closer to its finish line.

Mathematical methods, classical and quantum physics, relativity, gravitation, numerical simulation, computational modeling

Cross-disciplinary physics and related areas of science and technology

Reducing the Number of Tests Using Bayesian Inference to Identify Infected Patients in Group Testing

Group testing is a method of identifying infected patients by performing tests on a pool of specimens. Bayesian inference and a corresponding belief propagation (BP) algorithm are introduced to identify the infected patients in group testing.

Statistical physics and thermodynamics

Cross-disciplinary physics and related areas of science and technology

Taking a Better Look at Data to Predict Exceptional Materials

Instead of regression, the evaluation values to measure the degree of separation of the distributions of the target variable were studied and applied to the magneto crystallineanisotropy of Co/Fe films.

Cross-disciplinary physics and related areas of science and technology

Magnetic properties in condensed matter

Review of Cutting-Edge Research on Iron Selenide Superconductors

Scientists review the incredible progress in our understanding of the superconducting properties of iron selenide and provide their own insights, taking us one step closer to revolutionizing energy and electronics.

Superconductivity

Cross-disciplinary physics and related areas of science and technology