KP-approach for non-symmetric short-range defects: resonant states and alloy bandstructure

Details KP-approach for non-symmetric short-range defects: resonant states and alloy bandstructure KP-approach for non-symmetric short-range defects: resonant states and alloy bandstructure

2002-07-27

arxiv.org/abs/cond-mat/0207661v2

Phys. Stat. Sol. (b) 241, 329 (2004)

Physics

Condensed Matter

Materials Science

Extended version, 9 pages, 6 figures (EPS)

Scientific paper

The short-range defect with reduced symmetry is studied in the framework of KP-approach taking into account a matrix structure of potential energy in the equations for envelope functions. The case of the narrow-gap semiconductor, with defects which are non-symmetric along the [001], [110], or [111] directions, is considered. Resonant state at a single defect is analyzed within the Koster-Slater approximation. The bandstructure modification of the alloy, formed by non-symmetric impurities, is discussed and a generalized virtual crystal approximation is introduced.

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