Far-infrared spectroscopy of CdTe1-xSex(In): Phonon properties

被引：5
作者：
Petrovic, M. [1 ]
Romcevic, N. [1 ]
Trajic, J. [1 ]
Dobrowolski, W. D. [2 ]
Romcevic, M. [1 ]
Hadzic, B. [1 ]
Gilic, M. [1 ]
Mycielski, A. [2 ]
机构：
[1] Univ Belgrade, Inst Phys, Belgrade 11080, Serbia
[2] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland
来源：
INFRARED PHYSICS & TECHNOLOGY | 2014年 / 67卷
关键词：
Semiconductors; Electron-phonon interactions; Light absorption and reflection; RAMAN-SPECTROSCOPY; NANOPARTICLES; SURFACE; SPECTRA; MODES;
D O I：
10.1016/j.infrared.2014.08.010
中图分类号：
TH7 [仪器、仪表];
学科分类号：
0804 ; 080401 ; 081102 ;
摘要：
The far-infrared reflectivity spectra of CdTe0.97Se0.03 and CdTe0.97Se0.03(In) single crystals were measured at different temperatures. The analysis of the far-infrared spectra was carried out by a fitting procedure based on the dielectric function which includes spatial distribution of free carriers as well as their influence on the plasmon-phonon interaction. We found that the long wavelength optical phonon modes of CdTe1-xSex mixed crystals exhibit a two-mode behavior. The local In mode at about 160 cm(-1) is observed. In both sample, a surface layer with a low concentration of free carriers (depleted region) are formed. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：323 / 326
页数：4
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