Crystal Research and Technology
Cryst. Res. Technol. 38, 359 (2003) - Abstract -

Raman scattering study of ZnBeSe semiconducting mixed crystals

M. Szybowicz, M. Kozielski, F. Firszt*, S. Legowski*, H. Meczynska*

Faculty of Technical Physics, Poznan University of Technology, Nieszawska 13A, 60-965 Poznań, Poland
*Institute of Physics, N. Copernicus University, Grudziądzka 5/7, 87-100 Toruń, Poland

Keywords    semiconducting mixed crystals, Raman scattering, temperature dependence of optical phonons

The results of a study of Raman scattering of Zn1-xBexSe 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 Zn1-xBexSe 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.



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