Fermi Surface in USb Due to Orbit Split 5f Band

Abstract

Anomalous properties in U and Np monopnictides are explained based on the orbit split Hartree-Fock-type 5f band model. In particular, the de Haas-van Alphen measurement in USb in the 3k magnetic order is explained very well in the present model accompanied by a strong electron-hole nesting, which is consistent with a strong increase in resistivity and very small electronic specific heat in the 3k ordering region.