Ferrotoroidic Moment as a Quantum Geometric Phase

Details Ferrotoroidic Moment as a Quantum Geometric Phase Ferrotoroidic Moment as a Quantum Geometric Phase

2008-11-22

arxiv.org/abs/0811.3656v1

Physical Review Letters 101, 077203 (2008)

Physics

Condensed Matter

Strongly Correlated Electrons

Scientific paper

10.1103/PhysRevLett.101.077203

We present a geometric characterization of the ferrotoroidic moment in terms of a set of Abelian Berry phases. We also introduce a fundamental complex quantity which provides an alternative way to calculate the ferrotoroidic moment and its moments, and is derived from a second order tensor. This geometric framework defines a natural computational approach for density functional and many-body theories.

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