We aim to discover new phenomena and new physics of actinide and rare-earth compounds, where the f-electrons play crucial roles for their intriguing properties. We can grow high quality single crystals and discover new materials in our actinide laboratory, which is one of the few facilities of its kind in the world. We perform macroscopic as well as microscopic measurements very precisely under extreme conditions (low temperature, high magnetic field and high pressure) on high quality single crystals.
The physics of f-electron systems, including both actinide and rare-earth compounds, are an important aspect of strongly correlated electron systems, where the nearly localized f-electrons and the conduction electrons show strong interactions. As the effective mass of conduction electrons reaches values 100-1000 times larger than the rest mass of an electron, they are called heavy fermion. Owing to the strong interaction between electrons, a large variety of fascinating phenomena, such as coexistence/competition of magnetism and superconductivity, multipole order, non-Fermi liquid, quantum critical phenomena, are found. For instance, we have discovered NpPd5Al2, the first Np-based superconductor. Not only domestic collaborations but also international collaborations are strongly promoted.