Quantum Phase Transition in Spin Dimer Systems

Exploring Electronic States in BEDT-TTF Organic Superconductors

Superconductivity

Electronic transport in condensed matter

Magnetic properties in condensed matter

This review, published in the Journal of the Physical Society of Japan, provides a comprehensive summary of the electronic states observed in BEDT-TTF type organic superconductors, including metal-insulator transitions, Mottness transitions, non-Fermi liquids, quantum spin liquids, and Bose-Einstein condensation.

Variety of Mechanically Induced Spin Currents in Rashba Systems

Electronic transport in condensed matter

Magnetic properties in condensed matter

Structure and mechanical and thermal properties in condensed matter

Various types of spin currents, including unconventional types, are generated in Rashba spin-orbit coupled systems by dynamic lattice distortions associated with, for example, surface acoustic waves.

Current Melt Frozen Electrons

Dielectric, optical, and other properties in condensed matter

Magnetic properties in condensed matter

The origin of the current-induced insulator-to-metal transition of samarium monosulfide was explained by the 4f−5d hybridization observed using optical reflectivity and photoelectron spectroscopies.

Towards Uncovering the Hidden Order of URu₂Si₂ Phase Transition

Magnetic properties in condensed matter

Electronic structure and electrical properties of surfaces and nanostructures

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.

Magnetic Excitation in S = 1/2 Antiferromagnetic Chain CsCoCl₃ with Ising-Like Exchange Interaction

Magnetic properties in condensed matter

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.