Ferrotoroidic moment as a quantum geometric phase

被引：13

作者：

Batista, C. D. ^{[1
]}

Ortiz, G. ^{[2
]}

Aligia, A. A. ^{[3
,4
]}

机构：

[1] Los Alamos Natl Lab, Div Theoret, Los Alamos, NM 87545 USA

[2] Indiana Univ, Dept Phys, Bloomington, IN 47405 USA

[3] Comis Nacl Energia Atom, Ctr Atom Bariloche, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

[4] Inst Balseiro, RA-8400 San Carlos De Bariloche, Rio Negro, Argentina

来源：

PHYSICAL REVIEW LETTERS | 2008年 / 101卷 / 07期

关键词：

D O I：

10.1103/PhysRevLett.101.077203

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

We present a geometric characterization of the ferrotoroidic moment tau in terms of a set of Abelian Berry phases. We also introduce a fundamental complex quantity z(mu nu), which provides an alternative way to calculate tau and its moments and is derived from the tensor T-mu nu=2 Sigma(j)r(j)(mu)S(j)(nu). This geometric framework defines a natural computational approach for density functional and many-body theories.

引用

页数：4

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