One-step photoemission calculations for ideal GaAs(001) and AlAs(001) surfaces and (GaAs){sub m}(AlAs){sub n} superlattices
Normal photoemission spectra for the (001) surface of (AlAs){sub 2}(GaAs){sub 2} and (AlAs){sub 3}(GaAs){sub 3} superlattices are calculated. They represent the first calculations within the one-step model for layered superlattices. The aim is to develop tools to extract general features from measured spectra specific to superlattices. The spectra show the opening of band gaps at the Brillouin zone edge, which are characteristic for the modified periodicity of the superlattice. Furthermore, the layer-resolved photocurrent allows to identify emissions from AlAs layers hidden below the first two or three GaAs layers. As a reference, theoretical normal emission spectra from the pure bulk GaAs and AlAs(001) surfaces are shown.
- Sponsoring Organization:
- (US)
- OSTI ID:
- 40205508
- Journal Information:
- Physical Review B, Journal Name: Physical Review B Journal Issue: 19 Vol. 63; ISSN 0163-1829
- Publisher:
- The American Physical Society
- Country of Publication:
- United States
- Language:
- English
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