We are investigating the mechanism of high-temperature superconductivity by looking into how magnetism and superconductivity coexist and/or compete against each other within the same matter in the atomic level.

Using materials having a crystal structure composed of a corner-shared network of regular tetrahedrons as testing grounds, we are investigating the properties of materials such as "heavy fermion (electron) state" that might be associated with frustration caused by antiferroic interaction (interaction that tries to arrange a degree of freedom, such as a spin, an orbital, or an electric charge, in the opposite direction) between atoms situated at the corners.

Hydrogen absorbed by a substance sometimes causes significant changes in the macroscopic properties of that substance, such as electrical resistivity, with a tiny amount like a few ppm. Such a small amount of hydrogen is difficult to be studied by conventional methods. By implanting muon that behaves like a light isotope of hydrogen and thereby serves to simulate the state of interstitial hydrogen atoms in matter, we are aiming at elucidating the mechanism how hydrogen changes the physical properties of a substance.

To investigate the microscopic origin of friction, which is a common phenomenon in our daily life, we are studying the dynamic characteristics of soft matter over a wide time period by utilizing the muon's unique observation time window.