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Method of Invariants Applied to Indirect Gap Absorption
Author(s) -
Bednarek S.,
Rössler U.
Publication year - 1982
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.2221100225
Subject(s) - degeneracy (biology) , invariant (physics) , spin–orbit interaction , absorption edge , absorption (acoustics) , condensed matter physics , coupling (piping) , work (physics) , band gap , physics , materials science , quantum mechanics , optics , bioinformatics , metallurgy , biology
The phonon assisted optical transitions at the fundamental (indirect) absorption edge in Si and GaP are described using the invariant method. In contrast to earlier work the spin degeneracy of the electron states is considered. Transitions are found which become allowed due to spin–orbit coupling.