EFFECTS OF BAND-STRUCTURE AND SPIN IN QUANTUM DOTS

被引:62
作者
DARNHOFER, T
ROSSLER, U
机构
[1] Institut für Theoretische Physik, Universität Regensburg
来源
PHYSICAL REVIEW B | 1993年 / 47卷 / 23期
关键词
D O I
10.1103/PhysRevB.47.16020
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
Band structure and spin can modify the simple two-mode far-infrared spectra of quantum dots. In our investigation of these effects we start from a k.p Hamiltonian for the conduction, valence, and spin-orbit split-off bands, with potentials for subband formation and harmonic lateral confinement. Taking into account the nonparabolicity of the conduction band and spin-orbit coupling due to the confining potentials, we calculate the dipole excitation spectra of quantum dots on InSb with one and two electrons. Spin-orbit coupling leads to a level anticrossing in the omega- mode and nonparabolicity modifies the omega+ mode demonstrating violation of Kohn's theorem.
引用
收藏
页码:16020 / 16023
页数:4
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