Indirect exchange interaction between magnetic impurities in the two-dimensional topological insulator based on CdTe/HgTe/CdTe quantum wells

被引：17
|
作者：
Kurilovich, P. D. [1 ,2 ]
Kurilovich, V. D. [1 ,2 ]
Burmistrov, I. S. [1 ,3 ]
机构：
[1] Moscow Inst Phys & Technol, Moscow 141700, Russia
[2] Skolkovo Inst Sci & Technol, Moscow 143026, Russia
[3] LD Landau Inst Theoret Phys, Kosygina St 2, Moscow 117940, Russia
来源：
PHYSICAL REVIEW B | 2016年 / 94卷 / 15期
基金：
俄罗斯基础研究基金会;
关键词：
SPIN; RESONANCE; SEMICONDUCTORS; SURFACE; MN;
D O I：
10.1103/PhysRevB.94.155408
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
We study indirect exchange interaction between magnetic impurities in the (001) CdTe/HgTe/CdTe symmetric quantum well. We consider low temperatures and the case of the chemical potential placed in the energy gap of the two-dimensional quasiparticle spectrum. We find that the indirect exchange interaction is suppressed exponentially with the distance between magnetic impurities. The presence of inversion asymmetry results in oscillations of the indirect exchange interaction with the distance and generates additional terms which are noninvariant under rotations in the (001) plane. The indirect exchange interactionmatrix has complicated structure with some terms proportional to the sign of the energy gap.
引用
收藏
页数：12
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