LUMINESCENCE OF Cd0.7Mn0.3Te CRYSTALS IN MAGNETIC FIELD: LINEWIDTH, LANDAU QUANTIZATION, AND CARRIER EFFECTIVE MASS

被引：2

作者：

Barauskaite, L. ^{[1
]}

Brazis, R. ^{[1
]}

Ivanov, V. ^{[2
]}

Godlewski, M. ^{[2
]}

机构：

[1] Inst Semicond Phys, LT-01108 Vilnius, Lithuania

[2] Polish Acad Sci, Inst Phys, PL-00668 Warsaw, Poland

来源：

LITHUANIAN JOURNAL OF PHYSICS | 2009年 / 49卷 / 03期

关键词：

photoluminescence; linewidth (FWHM); effective mass; composition disorder fluctuations; magnetic fluctuations; EXCITONIC PHOTOLUMINESCENCE LINEWIDTH; FLIP RAMAN-SCATTERING; CYCLOTRON-RESONANCE; OPTICAL-PROPERTIES; BAND ELECTRONS; FLUCTUATIONS; LOCALIZATION; EXCHANGE; ABSORPTION; POLARONS;

D O I：

10.3952/lithjphys.49312

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

Cd0.7Mn0.3Te crystal photoluminescence is studied in magnetic field up to 7 T in Voigt geometry at 1.6-1.7 K temperature. The range of magnetic field where the approximation of effective band gap narrowing by the s, p - d exchange-interaction-induced term correctly describes experimental results is discussed. Luminescence linewidth (FWHM) broadening due to composition disorder and magnetization fluctuations is evaluated. Functional dependence on magnetic field of magnetic part in broadening, the FWHM(B)(magn)., is determined. From the patterns of Landau quantization in luminescence spectra the carrier effective mass value m(e)* = 0.104 is calculated and its increase in magnetic field is obtained. Contribution of nonparabolicity and band coupling effects is evaluated in the observed carrier effective mass growth effect.

引用

页码：267 / 275

页数：9

共 32 条

[1]

ABLYAZOV NN, 1983, FIZ TVERD TELA+, V25, P353

[2] CLASSICAL ONE-DIMENSIONAL HEISENBERG MAGNET IN AN APPLIED FIELD [J].