First-principles calculations of many-body band-gap narrowing at an Al/GaAs(110) interface
- 15 March 1993
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 70 (11) , 1685-1688
- https://doi.org/10.1103/physrevlett.70.1685
Abstract
We calculate the quasiparticle electronic structure of a Al/GaAs(110) Schottky barrier as a function of distance from the interface, using the GW self-energy operator. The GaAs band gap is significantly narrowed near the metal, although the classical picture of image-potential narrowing is subject to large quantum corrections. The nature of these corrections is explored further using model calculations.Keywords
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