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题名: Controllable electron g-factors in HgMnTe quantum spheres
作者: Zhu, YH;  Xia, JB
发表日期: 2008
摘要: The electronic structure and Lande electron g-factors of manganese-doped HgTe quantum spheres are investigated, in the framework of the eight-band effective-mass model and the mean-field approximation. It is found that the electronic structure evolves continuously from the zero-gap configuration to an open-gap configuration with decreasing radius. The size dependence of electron g-factors is calculated with different Mn-doped effective concentration, magnetic field, and temperature values, respectively. It is found that the variations of electron g-factors are quite different for small and large quantum spheres, due to the strong exchange-induced interaction and spin-orbit coupling in the narrow-gap DMS nanocrystals. The electron g-factors are zero at a critical point of spherical radius R-c; however, by modulating the nanocrystal size their absolute values can be turned to be even 400 times larger than those in undoped cases. Copyright (c) EPLA, 2008.
KOS主题词: Diluted magnetic semiconductors;  conformal symmetry;  Faraday effect;  Nanocrystals;  Temperature;  Exchange
刊名: EPL
专题: 中国科学院半导体研究所(2009年前)_期刊论文

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推荐引用方式:
Zhu, YH ; Xia, JB .Controllable electron g-factors in HgMnTe quantum spheres ,EPL,2008 ,82(3): Art. No. 37004
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