Quantum Phase Transition in Spin Dimer Systems

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

Magnetic properties in condensed matter

Electron states in condensed matter

Cross-disciplinary physics and related areas of science and technology

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.

Unification of Spin Helicity in the Magnetic Skyrmion Lattice of EuNiGe₃

Magnetic properties in condensed matter

In the magnetic skyrmion lattice of non-centrosymmetric EuNiGe₃, the original magnetic helicity, determined by the antisymmetric exchange interaction, is reversed, resulting in a unified helicity.

Antiferromagnetism Induces Dissipationless Transverse Conductivity

Electronic transport in condensed matter

Magnetic properties in condensed matter

Electronic structure and electrical properties of surfaces and nanostructures

An investigation using high-quality NbMnP crystals demonstrates that the anomalous Hall conductivity arising from antiferromagnetism is dissipationless, as expected from the intrinsic mechanism.

Structural Rotation and Falsely Chiral Antiferromagnetism: A New Combination Generating Ferrotoroidic State

Magnetic properties in condensed matter

Dielectric, optical, and other properties in condensed matter

The ferrotoroidic state, an exotic state of matter with broken space inversion and time-reversal symmetries, was achieved by combining structural rotation and falsely chiral antiferromagnetism in PbMn₂Ni₆Te₃O₁₈.

Understanding Electronic Ordering and Cross Correlations with Multipole Representation

Magnetic properties in condensed matter

This study reviews the recent advancements in research of multipole representations for understanding electronic orderings and cross-correlations in materials and presents future research directions.