Direct Evidence for Disorder Effects on the Electronic Structure of Selenium
- 18 October 1971
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 27 (16) , 1053-1057
- https://doi.org/10.1103/physrevlett.27.1053
Abstract
The electron states of amorphous and single-crystal trigonal selenium were investigated by high-resolution photoemission spectroscopy. Structures due to a high density of states 0.2 eV below and 6.9 eV above the valence-band edge for crystalline Se are absent in the amorphous phase, but structures due to deeper valence-band density-of-states features remain. The results provide the first direct evidence for disorder effects on the Se valence and conduction bands and agree with calculations for amorphous Se using a pseudopotential formalism.Keywords
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