Deep-shallow transitions and loss of amphoterism in type-II superlattices
- 17 August 1992
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 69 (7) , 1089-1092
- https://doi.org/10.1103/physrevlett.69.1089
Abstract
The traditional rules of effective-mass theory, that a substitutional dopant is a donor (acceptor) if it lies to the right (left) in the periodic table of the atom it replaces, are shown to be broken often in type-II-misaligned superlattices such as InAs/GaSb. Impurities commonly undergo deep-shallow transitions and transitions to ‘‘false valence,’’ and group-IV substitutional dopants can lose their amphoterism as remote layer thicknesses are varied.Keywords
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