Absence of X-point band overlap in divalent hexaborides and variability of the surface chemical potential
Conference
·
OSTI ID:797870
Angle-resolved photoemission measurements 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. While the global ARPES band structure and gap size observed are consistent with the results of bulk-sensitive soft x-ray absorption and emission boron K-edge spectroscopy, the surface-sensitive photoemission measurements also show a variation with cation, surface and time of the position of the surface chemical potential in the band structure.
- Research Organization:
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- USDOE Director, Office of Science. Office of Basic Energy Studies. Materials Science and Engineering Division; National Science Foundation (US)
- DOE Contract Number:
- AC03-76SF00098
- OSTI ID:
- 797870
- Report Number(s):
- LBNL-50851; R&D Project: A580SS; B& R KC0204016; TRN: US0202047
- Resource Relation:
- Conference: International Conference on Strongly Correlated Electrons with Orbital Degrees of Freedom (ORBITAL 2001), Sendai (JP), 09/11/2001--09/14/2001; Other Information: PBD: 4 Nov 2001
- Country of Publication:
- United States
- Language:
- English
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