Single Crystal Growth and de Haas–van Alphen Effect of Non-Centrosymmetric Heavy-Fermion Compound UPt₅

Abstract

We report single crystal growth of a non-centrosymmetric heavy-fermion paramagnet UPt 5 and its strongly-correlated electronic state investigated by the de Haas-van Alphen (dHvA) effect. UPt 5 crystallizes in a non-centrosymmetric cubic structure with the space group of F43m which is same as the well-known zinc-blende-or half-Heusler-type structure. We discuss detected dHvA frequencies based on the "orbital crossing" and the magnetic breakdown of the split hole Fermi surfaces pair. We also performed the energy band calculations using a local density approximation based on the 5 f-itinerant model, indicating the large density of states in the vicinity of Fermi energy E F due to the 5 f electrons.