Helical Quantum States in HgTe Quantum Dots with Inverted Band Structures

被引：113

作者：

Chang, Kai ^{[1
]}

Lou, Wen-Kai

机构：

[1] Chinese Acad Sci, Inst Semicond, SKLSM, Beijing 100083, Peoples R China

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 106卷 / 20期

关键词：

TOPOLOGICAL INSULATORS; WELLS; PHASE; SPINS;

D O I：

10.1103/PhysRevLett.106.206802

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We investigate theoretically the electron states in HgTe quantum dots (QDs) with inverted band structures. In sharp contrast to conventional semiconductor quantum dots, the quantum states in the gap of the HgTe QD are fully spin-polarized and show ringlike density distributions near the boundary of the QD and spin-angular momentum locking. The persistent charge currents and magnetic moments, i.e., the Aharonov-Bohm effect, can be observed in such a QD structure. This feature offers us a practical way to detect these exotic ringlike edge states by using the SQUID technique.

引用

页数：4

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