Influence of electric current and magnetic field on terahertz photoconductivity in Pb1-x Sn x Te(In)

被引：2
|
作者：
Ryabova, L. I. [1 ]
Nicorici, A. V. [2 ]
Danilov, S. N. [3 ]
Khokhlov, D. R. [1 ]
机构：
[1] Moscow MV Lomonosov State Univ, Moscow 119991, Russia
[2] Moldavian Acad Sci, Inst Appl Phys, MD-2025 Kishinev, Moldova
[3] Univ Regensburg, D-93040 Regensburg, Germany
来源：
JETP LETTERS | 2013年 / 97卷 / 09期
基金：
俄罗斯基础研究基金会;
关键词：
SEMICONDUCTORS; IMPURITIES; STATES;
D O I：
10.1134/S0021364013090105
中图分类号：
O4 [物理学];
学科分类号：
0702 ;
摘要：
Photoconductivity of Pb1 - x Sn (x) Te(In) solid solutions in the terahertz spectral range is defined by a new type of local electron states linked to the quasi-Fermi level. The paper deals with investigation of the influence of electric current and magnetic field on the amplitude of the terahertz photoconductivity in Pb1 - x Sn (x) Te(In) alloys of different composition. It is shown that the density of local electron states responsible for the positive persistent photoconductivity decreases with increasing electric current via a sample, as well as with transition to the hole conductivity in samples with a high content of tin telluride (x > 0.26). It is found that the magnetic field dependence of the positive photoconductivity is non-monotonous and has a maximum. The maximum position in magnetic field is proportional to the terahertz radiation quantum energy. Mechanisms responsible for the effects observed are discussed.
引用
收藏
页码：525 / 527
页数：3
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