Accession Number : AD0646998

Title :   PSEUDOPOTENTIAL THEORY OF EXCITON AND IMPURITY STATES,

Corporate Author : CHICAGO UNIV ILL

Personal Author(s) : Hermanson,J. ; Phillips,J. C.

Report Date : 1966

Pagination or Media Count : 37

Abstract : A formalism for studying central cell corrections to the effective mass equation is presented. A generalized impurity equation for excitons and impurity states is derived, including the effects of dielectric response and large-k variation of the effective mass. Because of the presence of interband matrix elements of the impurity potential in the general case, this equation is not easily solved. By transforming to a representation in which the core parts of Bloch functions are removed a pseudo-wave equation is developed. In this equation the effective impurity potential is substantially cancelled within the central cell, so that interband matrix elements are sharply reduced, and the usual one-band approximation is valid. (Author)

Descriptors :   (*CRYSTAL DEFECTS, POTENTIAL THEORY), (*EXCITONS, POTENTIAL THEORY), IMPURITIES, CRYSTAL LATTICES, EQUATIONS, BAND THEORY OF SOLIDS, SEMICONDUCTORS, DIELECTRICS, WAVE FUNCTIONS

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE