Investigation of carrier scattering mechanisms in n-Cd1-xMgxSe single crystals using Fourier Transform Infrared Spectroscopy

被引：4

作者：

Pawlak, M. ^{[1
]}

Malniski, M. ^{[2
]}

Firszt, F. ^{[1
]}

Legowski, S. ^{[1
]}

Meczynska, H. ^{[1
]}

Ollesch, J. ^{[3
]}

Ludwig, A. ^{[4
]}

Marasek, A. ^{[1
]}

Schulte-Braucks, C. ^{[4
]}

机构：

[1] Nicholas Copernicus Univ, Inst Phys, Fac Phys Astron & Informat, PL-87100 Torun, Poland

[2] Koszalin Univ Technol, Dept Elect & Comp Sci, PL-75453 Koszalin, Poland

[3] Ruhr Univ Bochum, Dept Biophys, D-44780 Bochum, Germany

[4] Ruhr Univ Bochum, D-44780 Bochum, Germany

来源：

INFRARED PHYSICS & TECHNOLOGY | 2014年 / 64卷

关键词：

Free carrier absorption; Scattering mechanisms; Mixed crystals; II-VI semiconductors; CdMgSe; CDMGSE MIXED-CRYSTALS; ABSORPTION;

D O I：

10.1016/j.infrared.2014.02.012

中图分类号：

TH7 [仪器、仪表];

学科分类号：

0804 ; 080401 ; 081102 ;

摘要：

This paper presents results of investigations of carrier scattering mechanisms in n-Cd1-xMgxSe mixed crystals with magnesium content varying from x = 0 to x = 0.33. Experimental results obtained by means of the Fourier Transform Infrared Spectroscopy (FT-IR) and Hall measurements are discussed in the frame of the Drude and the quantum theories. The character of the wavelength dependence of the optical absorption coefficient in investigated crystals was found to be of the type if, where 2<p < 3.5. The p = 2 is expected from the Drude theory and the relaxation time approximation. The obtained experimental values of p parameter suggest that the optical phonon and impurity scattering mechanisms are dominating scattering mechanisms in these crystals. The calculated carrier concentration from optical absorption spectrum for a n-CdSe crystal is in a good agreement with this obtained from Hall measurement. (C) 2014 Elsevier B.V. All rights reserved.

引用

页码：115 / 118

页数：4

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