STRESS EFFECTS ON ACCEPTOR STATES IN GERMANIUM (IMPURITIES, GROUP THEORY, DEFORMATION POTENTIALS)
Abstract
The splittings of acceptor levels in germanium under applied uniaxial stress are calculated. Unstressed acceptor levels are taken from Baldereschi and Lipari's spherical model (1973) and symmetry adapted for the site symmetry of germanium. Stress effects are discussed and a linearized strain Hamiltonian derived. The symmetry adapted acceptor states are perturbed by the strain Hamiltonian and expressions relating the deformation potentials of the acceptor levels to those of the valence band are obtained. Thus an explanation of why the various acceptor levels split in a way different from the valence band and each other is provided. Such behavior is experimentally observed.
Degree
Ph.D.
Subject Area
Condensation
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