Far-infrared study of impurity local modes in Ni-doped PbTe

被引：24
|
作者：
Romcevic, N.
Trajic, J.
Kuznetsova, T. A.
Romcevic, M.
Hadzic, B.
Khokhlov, D. R.
机构：
[1] Inst Phys, Belgrade 11080, Serbia
[2] Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119899, Russia
来源：
JOURNAL OF ALLOYS AND COMPOUNDS | 2007年 / 442卷 / 1-2期
关键词：
crystal growth; impurity in semiconductors; light absorption and reflection;
D O I：
10.1016/j.jallcom.2006.09.164
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
In this paper, we present far-infrared reflection spectra of Ni doped PbTe single crystal samples. Crystals of PbTe(Ni) were grown by the Bridgman method. These spectra were analyzed using a fitting procedure based on the modified plasmon-phonon interaction model. Together with the strong plasmon-phonon coupling we obtained three local modes of Ni at about 130, 165 and 190 cm(-1) which correspond to the impurity atoms in different valence states. The positions of these modes depend on impurity center charge, and their intensities depend on temperature and Ni concentration. (C) 2007 Elsevier B.V. All rights reserved.
引用
收藏
页码：324 / 327
页数：4
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