Electronic structures of Ce compounds in the cubic Laves phase

Abstract

The energy band structures for the four compounds CeRu₂, CeRh₂, CeCo₂ and LaRu₂ in the cubic Laves phase are calculated by the self-consistent APW method. Wide 4f band are obtained in the Ce compounds, and the numbers of f electrons in them are nearly one. The Fermi surfaces have complicated forms in these compounds. Although the average contribution of the 4f components over the Fermi surface in CeRu₂ is 28.8%, the character of the states is not uniform. The average weight of 4f components on various cyclotron orbits varies from 5 to 45%.