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Sublattice Displacement Effects in the Electromodulation Spectra of Zincblende‐Type Crystals
Author(s) -
Suisky D.,
Enderlein B.,
Lange H.
Publication year - 1980
Publication title -
physica status solidi (b)
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.51
H-Index - 109
eISSN - 1521-3951
pISSN - 0370-1972
DOI - 10.1002/pssb.2220990216
Subject(s) - degeneracy (biology) , deformation (meteorology) , spectral line , displacement (psychology) , condensed matter physics , strain (injury) , constant (computer programming) , molecular physics , materials science , chemistry , physics , quantum mechanics , medicine , psychology , bioinformatics , computer science , composite material , psychotherapist , biology , programming language
Abstract Expressions are derived for the deformation potential constants for pure piezomodulation (PM) and piezoelectrically induced linear electromodulation (LER EM), taking into account the difference in sublattice displacements caused by strain and field calculated in a previous paper. It is shown that in case of star degeneracy the sublattice contributions to the deformation potential constants C 1 5and C 3 5differ in LER EM and PM. The theory is applied to the experimental PM and LER EM spectra at the E 1 E 1 + Δ 1 transitions of GaAs reported in the literature. In agreement with the predictions of the theory, the deformation potential constant C 1 5extracted from the LER EM data is found to be much greater than that obtained from PM spectra.