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Deformation Potentials of the Energy Gaps in Trigonal Selenium
Author(s) -
Lingelbach W.,
Weiser G.
Publication year - 1975
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.2220700119
Subject(s) - perpendicular , brillouin zone , condensed matter physics , conduction band , spectral line , deformation (meteorology) , materials science , trigonal crystal system , band gap , electron , stress (linguistics) , valence (chemistry) , molecular physics , chemistry , physics , crystallography , composite material , geometry , crystal structure , mathematics , philosophy , organic chemistry , astronomy , quantum mechanics , linguistics
The stress induced shift of the indirect gaps and of some direct transitions at different points of the Brillouin zone has been measured from the dependence of electroreflectance and electroabsorption spectra on uniaxial stress parallel and perpendicular c. Macroscopic and microscopic (generalized) deformation potentials have been derived for the corresponding energy gaps. The results are compared with the electron charge distribution of valence band and conduction band states. The spectra show evidence for a splitting of the conduction band at H by stress perpendicular c .