INPLANE MAGNETIC-FIELD-INDUCED ANISOTROPY OF 2D FERMI CONTOURS AND THE FIELD-DEPENDENT CYCLOTRON MASS

被引:54
作者
SMRCKA, L
JUNGWIRTH, T
机构
[1] Inst. of Phys., Acad. of Sci., Praha
关键词
D O I
10.1088/0953-8984/6/1/007
中图分类号
O469 [凝聚态物理学];
学科分类号
070205 ;
摘要
The electronic structure of a 2D gas subjected to a tilted magnetic field, with a strong component parallel to the GaAs/AlGaAs interface and a weak component oriented perpendicularly, is studied theoretically. It is shown that the parallel field component modifies the originally circular shape of a Fermi contour while the perpendicular component drives an electron by the Lorentz force along a Fermi line with a cyclotron frequency given by its shape. The corresponding cyclotron effective mass is calculated self-consistently for several concentrations of 2D carriers as a function of the in-plane magnetic field. The possibility of detecting its field-induced deviations from the zero-field value experimentally is discussed.
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页码:55 / 64
页数:10
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