Materials Processing and Characterization Division

Actinide Materials Science

Dai AOKI

Prof.Dai AOKI

  • Assoc. Prof. Fuminori HONDA
  • Assist. Prof. Dexin LI
  • Assist. Prof. Yoshiya HOMMA

Heavy Fermion Physics of Actinide and Rare- Earth Compounds

We aim to discover new phenomena and new physics of actinide and rare-earth compounds. We grow high quality single crystals and develop new materials in our actinide laboratory, which is one of the few facilities in the world. We perform precise measurements under extreme conditions (low temperature, high magnetic field, 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 physics. 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.

actinide, f-electron systems, heavy fermion, superconductivity, magnetism
First neptunium-based superconductor NpPd5Al2

First neptunium-based superconductor NpPd5Al2

High quality single crystal growth of ferromagnetic superconductor using the Czochralski method

High quality single crystal growth of ferromagnetic superconductor using the Czochralski method

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