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.

Superfluid ⁴He droplets exhibit robustly quantized dripping periods despite gradually varying input flow rates owing to their high amplitude and undamped oscillation.

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.

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.

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.

Physicists from Japan present complete formulas that consider the induced current and velocity-dependent terms for estimating the beta decay rates in heavy nuclei with high accuracy.

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.

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.

A groundbreaking study reveals a new time-local fluctuation theorem using machine learning, revolutionizing our understanding of deterministic nonequilibrium steady state systems.

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.

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.

This study comprehends a way to probe modified theories of gravity on cosmological scales by combining theoretical advancements and observational data for upcoming cosmological observations.

The unique sense of rotation of the cycloidal magnetic order was clarified in noncentrosymmetric EuIrGe₃ by using circularly polarized resonant x-ray diffraction.

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.”

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.

A systematic investigation of the optical power dependence of the response of diamond quantum sensors provides valuable guidelines for accurate magnetic field measurements.

We find that the periodic Toda lattice belongs to the same topological class as the Thouless pump.

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.

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.

We investigate Δ and Ω baryons as meson–baryon bound states in lattice quantum chromodynamics and show that their difference results from the kinematic structure of the two meson–baryon systems, and not their interaction.

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.

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.

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.

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.

Bulk reconstruction in anti-de Sitter/conformal field theory is fundamental to our understanding of quantum gravity. We show that contrary to popular belief, bulk reconstruction is rather simple and intuitive.

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.

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.

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.

We check the validity of the "divisibility property," predicted by the Stolz–Teichner conjecture, for several infinite families of theories built from Duncan’s Supermoonshine module. Along the way, we develop the tools necessary to construct the so-called "periodicity class."

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.

A string field theory for closed bosonic strings is formulated using pants decomposition and the Fokker–Planck formalism.

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.

The journal Progress of Theoretical and Experimental Physics (PTEP) celebrates its tenth (10th) anniversary in 2023. On this occasion, we take stock of some of its most notable publications.

We have constructed a fractional topological charge in the lattice Abelian gauge theory formalism, which avoids the issue of infinite degrees of freedom in continuum spacetime quantum field theory.

The newly selected LiteBIRD satellite aims to detect cosmic inflation signals by identifying the imprint of primordial gravitational waves in the Cosmic Microwave Background polarization.

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.

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.

Magnetic order and superconductivity coexist in a noncentrosymmetric topological semimetal, EuAuBi. EuAuBi exhibits a large, anisotropic critical field with Rashba spin–orbit coupling, which can help develop superconducting spintronic materials.

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.

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.

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.

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.

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.