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Electroreflectance Spectra and Energy Band Structure of CdSnP 2
Author(s) -
Kavaliauskas J.,
Karavaev G. F.,
Leonov E. I.,
Orlov V. M.,
Chaldyshev V. A.,
Šileika A.
Publication year - 1971
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.2220450208
Subject(s) - brillouin zone , spectral line , chalcopyrite , absorption edge , sphalerite , polarization (electrochemistry) , absorption spectroscopy , valence (chemistry) , chemistry , anisotropy , electronic band structure , materials science , molecular physics , band gap , condensed matter physics , optics , mineralogy , optoelectronics , physics , pyrite , organic chemistry , astronomy , copper
The electroreflectance spectra of CdSnP 2 chalcopyrite single crystals have been investigated in the spectral region 1.0 to 4.7 eV at room temperature using polarized light. The electroreflectance structure in the region of the fundamental absorption edge and its polarization dependence are found to be in good agreement with the relative location of the valence bands earlier predicted theoretically. A great number of electroreflectance peaks has been observed in the spectral region 2.4 to 4.7 eV and interpreted by optical transitions at the T, T, and N points of the Brillouin zone of the chalcopyrite lattice. The only transitions used were direct ones and responsible for the main structure in the optical spectra of sphalerite crystals. In addition, the fine structure of these optical transitions due to crystal field splitting has been included.