Huge electric fields in Ge/GaAs (001) and (111) superlattices and their effect on interfacial stability
- 15 February 1990
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 41 (6) , 3509-3512
- https://doi.org/10.1103/physrevb.41.3509
Abstract
Self-consistent relativistic pseudopotential calculations of /(GaAs (001) and (111) superlattices yield a sawtooth potential resulting in electric fields of magnitude V/m. This has little effect on the (111) energy bands but localized states on the two (001) interfaces are shifted in opposite directions, resulting in a negative energy gap. Formation-enthalpy calculations indicate the (111) interface is probably stable against reconstruction while the (001) interface is probably unstable.
Keywords
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