Order parameter of non-magnetic phase transition at 105 K, which is called "hidden order", was revealed in spin-orbit coupled iridate Ca₅Ir₃O₁₂. This discover of order parameter with rotational and directional degrees of freedom in atomic scale will lead to development of energy saving devices with a fast cross-correlated response.

The scaling relation between the Seebeck coefficient and solvent viscosity would enable for the design of improved thermogalvanic cells.

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.

We found a beautiful empirical rule (α ∝ η^-0.4) between the electrochemical Seebeck coefficient α for Fe²⁺/Fe³⁺ redox pair and viscosity coefficient η of the organic solvent.

Helium confined in a nanoporous material shows a four dimensional superfluid transition. This is a unique example of four dimensional critical phenomenon caused by strong quantum fluctuation.

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.

A researcher has developed a new theory to describe the Brownian motion of a small object that is confined in a fluctuating random surface.

We have demonstrated the power of machine learning in representing quantum many-body states accurately. We have extended the applicability of neural-network wave functions and shown their usefulness in fermion-boson-coupled systems and excited-state calculations.

Comprehensive curated reviews by researchers on the latest research in hydrogen-related applications, including proton conductors, superconductivity, electrochemistry with hydrides, and more.

Reviews on the most recent advances in hydrogen science, including cutting-edge fundamental studies in condensed matter physics with hydrogen-containing materials.