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On Concentration Dependences of the Band Parameters in A II B VI Solid Solutions with Structural Phase Transitions
Author(s) -
Areshkin A. G.,
Suslina L. G.,
Fedorov D. L.
Publication year - 1989
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.2221540220
Subject(s) - wurtzite crystal structure , solid solution , ionic bonding , stacking , chemistry , crystallography , phase (matter) , exciton , phase transition , electronic band structure , analytical chemistry (journal) , condensed matter physics , physics , ion , organic chemistry , chromatography , hexagonal crystal system
The connection between the structure of solid solution and its spectroscopic and band parameters is discussed on the example of Zn x Cd 1− x Se and Zn 1− x Mg x S systems with the structure phase transition: zinc blende (ZB)‐wurtzite (W). It is shown that if the E g ( x ) dependence is parabolic for the ZB and W pure structure ranges, it is linear in the phase transition range (for the Zn 1− x Mg x S system). E g ( x ) is always higher for the anisotropic crystals (with stacking faults (SF) and W) than for the ZB ones depending on the more ionic character of their chemical bond. The influence of the disorder potential due to composition x and SF concentration fluctuations on the exciton and band parameters of the solid solutions is considered.