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Raman scattering study of ZnBeSe semiconducting mixed crystals
Author(s) -
Szybowicz M.,
Kozielski M.,
Firszt F.,
Łęgowski S.,
Męczyńska H.
Publication year - 2003
Publication title -
crystal research and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.377
H-Index - 64
eISSN - 1521-4079
pISSN - 0232-1300
DOI - 10.1002/crat.200310044
Subject(s) - raman spectroscopy , raman scattering , phonon , transverse plane , scattering , condensed matter physics , materials science , chemistry , molecular physics , optics , physics , structural engineering , engineering
The results of a study of Raman scattering of Zn 1‐x Be x Se mixed crystals are reported. Raman measurements were performed for crystals with x = 0.12 and x = 0.25 Be at room temperature and liquid nitrogen temperature. From the Raman spectra the longitudinal optical and transverse optical modes which correspond to ZnSe‐like and BeSe‐like were distinguished. Theoretical calculations of frequencies of BeSe modes and force constants for Zn 1‐x Be x Se were also performed using modified random element isodisplacement model. It has been shown that the dependence of the phonon energy on temperature may be described by the modified Klemens model.