Nonquantized dirac monopoles and strings in the Berry phase of anisotropic spin systems

被引：23

作者：

Bruno, P ^{[1
]}

机构：

[1] Max Planck Inst Mikrostrukturphys, D-06120 Halle Saale, Germany

来源：

PHYSICAL REVIEW LETTERS | 2004年 / 93卷 / 24期

关键词：

D O I：

10.1103/PhysRevLett.93.247202

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The Berry phase of an anisotropic spin system that is adiabatically rotated along a closed circuit C is investigated. It is shown that the Berry phase consists of two contributions: (i) a geometric contribution which can be interpreted as the flux through C of a nonquantized Dirac monopole, and (ii) a topological contribution which can be interpreted as the flux through C of a Dirac string carrying a nonquantized flux, i.e., a spin analogue of the Aharonov-Bohm effect. Various experimental consequences of this novel effect are discussed.

引用

页数：4

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