Open AccessLOCAL AND QUASI-LOCAL MODES OF Zn IN CdTe
Author(s) -
Lu Wei,
Hongjuan Ye,
Zhizhou Yu,
Suying Zhang,
Ying Fu,
Xu Wen-Lan,
Xuechu Shen
Publication year - 1988
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.37.197
Subject(s) - phonon , cadmium telluride photovoltaics , reflection (computer programming) , absorption (acoustics) , materials science , relaxation (psychology) , spectral line , range (aeronautics) , molecular physics , absorption spectroscopy , condensed matter physics , atomic physics , optics , physics , optoelectronics , psychology , social psychology , astronomy , computer science , composite material , programming language
We report here the far infrared absorption and reflection spectra of the mixed crystals ZnxCd1-xTe with small x in the temperature range of 4.2-300 K and the frequency region of 20-350 cm-1. The local and quasi-local modes induced by Zn and ZnTe in CdTe and the CdTe-like 2TA two-phonon absorption are observed. The frequencies of the modes are estimated by useing the mass-defect model combined with Green's function method. The random element isodisplacement (REI) model is used to calculated the two mode behaviors of the mixed crystals and to best fit the reflection spectra. Besides, the temperature dependence of the phonon absorption and the relaxation factor of CdTe-like and ZnTe-like modes are calculated and explained.