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Optical Spectra and Energy Band Structure of the Monoclinic Crystals ZnP 2 and ZnAs 2
Author(s) -
Sobolev V. V.,
Syrbu N. N.
Publication year - 1972
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.2220510244
Subject(s) - monoclinic crystal system , absorption edge , spectral line , anisotropy , band gap , electronic band structure , condensed matter physics , materials science , reflection (computer programming) , relaxation (psychology) , dispersion (optics) , photoconductivity , absorption (acoustics) , molecular physics , crystallography , optics , chemistry , physics , crystal structure , optoelectronics , psychology , social psychology , programming language , computer science , composite material , astronomy
The anisotropic spectra of edge absorption, reflection, and photoconductivity of the monoclinic ZnP 2 , and ZnA 2 , crystals have been experimentally investigated at 293 and 77 °K. The group‐theoretical calculations of selection rules for interband transitions and the dispersion relaxation are discussed. Energy band structure models at the band gap are proposed on the basis of known theoretical and obtained experimental data. Polarisation investigations allowed to determine the subband symmetry responsible for transitions in the energy range from 1 to 12.5 eV.