Fermi surface of UB 4 studied by the de Haas–van Alphen oscillation and magnetoresistance experiments

Abstract

We grew a high-quality single crystal of UB 4 with the tetragonal structure and carried out the magnetoresistance and de Haas–van Alphen (dHvA) experiments. The magnetoresistance data indicate that UB 4 is a compensated metal with equal numbers of electrons and holes, and has open orbits along the [1 0 0] and [0 1 0] directions. We detected about 11 dHvA branches. The cyclotron masses are moderately heavy, ranging from 3.0 to 14.1 m 0, reflecting the electronic specific heat coefficient of 24.9 mJ/K 2 mol.