Experimental studies of the electronic structure of I--II and I--III intermetallic compounds with B32 (Zintl) structure
Journal Article
·
· J. Vac. Sci. Technol., A; (United States)
Photoemission and electron energy-loss data are reported for a series of I--II and I--III intermetallic compounds with B32 (Zintl) structure (LiAl, LiGa, LiIn, and LiZn). The structure of the valence band of LiAl, LiGa, and LiIn agrees well with theoretical relativistic augmented plane-wave (RAPW) band-structure calculations, while LiZn deviates appreciably from theory. Binding in Zintl phases is confirmed to be achieved through s-to-p charge promotion at both Li and the second metal, rather than by Li--Me(II, III) charge transfer. The rich near-edge x-ray absorption fine structure at the Li-1s absorption edge, and an interband transition observed in electron-energy loss spectra also support the RAPW predictions for the structure of the empty band. The plasmon energy in LiAl is equal to that calculated for free electrons, and its value is insignificantly affected by the defect structure of the LiAl lattice.
- Research Organization:
- Department of Materials Science and Engineering, University of Utah, Salt Lake City, Utah 84112
- OSTI ID:
- 6512076
- Journal Information:
- J. Vac. Sci. Technol., A; (United States), Journal Name: J. Vac. Sci. Technol., A; (United States) Vol. 5:4; ISSN JVTAD
- Country of Publication:
- United States
- Language:
- English
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