Quantum dot version of topological phase: Half-integer orbital angular momenta

被引：5

作者：

Mur, V. D. ^{[1
]}

Narozhny, N. B. ^{[1
]}

Petrosyan, A. N. ^{[1
]}

Lozovik, Yu. E. ^{[2
]}

机构：

[1] Moscow Engn Phys Inst, Moscow 115409, Russia

[2] Russian Acad Sci, Inst Spect, Troitsk 142190, Moscow Region, Russia

来源：

JETP LETTERS | 2008年 / 88卷 / 10期

基金：

俄罗斯基础研究基金会;

关键词：

D O I：

10.1134/S0021364008220116

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We show that there exists a topological phase equal to pi for circular quantum dots with an odd number of electrons. The non-zero value of the topological phase is explained by axial symmetry and two-dimensionality of the system. Its particular value (pi) is fixed by the Pauli exclusion principle and leads to half-integer values for the eigenvalues of the orbital angular momentum. Our conclusions agree with the experimental results of T. Schmidt et al., Phys. Rev. B 51, 5570 (1995), which can be considered as the first experimental evidence for the existence of the new topological phase and half-integer quantization of the orbital angular momentum in a system of an odd number of electrons in circular quantum dots.

引用

页码：688 / 692

页数：5

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