Electrons in GaAs/Ga1-xAlxAs superlattices: Spin and orbital states in a magnetic field

被引：1

作者：

Pfeffer, Pawel ^{[1
]}

Zawadzki, Wlodek ^{[1
]}

机构：

[1] Polish Acad Sci, Inst Phys, PL-02668 Warsaw, Poland

来源：

PHYSICAL REVIEW B | 2010年 / 81卷 / 23期

关键词：

ENVELOPE-FUNCTION APPROXIMATION; LATTICE BAND-STRUCTURE; SEMICONDUCTOR SUPERLATTICES; CONDUCTION ELECTRONS; OPTICAL-PROPERTIES; K.P THEORY; GAAS; QUANTIZATION; RESONANCE; LAYERS;

D O I：

10.1103/PhysRevB.81.235310

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Spin and orbital properties of electrons in GaAs/Ga1-xAlxAs superlattices (SLs) in an external longitudinal and transverse magnetic field are considered. A five-level P . p model of the band structure is used, accounting for nonparabolicity and nonsphericity of the conduction band in III-V compounds as well as their inversion asymmetry. The electron-spin g values are computed as functions of superlattice spacings. It is shown that, in the transverse-field configuration, the g value is different for various electron locations in an SL. Transverse and longitudinal cyclotron masses are calculated and compared with available experimental data for various GaAs/Ga1-xAlxAs SLs. Finally, orbital electron states in short SLs in a transverse magnetic field are described for different field intensities. In addition to the standard Landau levels unexpected states are found whose energies have a strong quadraticlike field dependence. The origin of the states is investigated.

引用

页数：8

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