Bulk Band Gaps in Divalent Hexaborides

Preprint
Publisher Website
Google Scholar
  • 20 July 2001
Abstract
Angle-resolved photoemission of the global band structure of divalent hexaborides reveals a >1 eV X-point gap between the valence and conduction bands, in contradiction to the band overlap assumed in several models of their novel ferromagnetism. Complementary bulk-sensitive soft x-ray absorption and emission measurements at the boron K-edge confirm a bulk band gap. The Fermi energy is typically located near the bottom of the conduction band, implying the presence of boron vacancy defects as the origin of the excess electrons and perhaps also the magnetic moments.

This publication has 0 references indexed in Scilit: