Conserved geometric phase and group velocity

Details Conserved geometric phase and group velocity Conserved geometric phase and group velocity

2006-02-03

arxiv.org/abs/cond-mat/0602090v1

Physics

Condensed Matter

Materials Science

Scientific paper

In this paper we make use of the concept of conserved geometric phase and of group velocity,in conjunction with the representation theory\cite{Dirac,Dirac-letture}, in order to derive some relevant physical quantities for the description of the dielectric and magnetic response of crystalline materials. As an application of the model, we derive the expression of the macroscopic dipole moment per unit volume, and the expression of the current induced by a uniform static external electromagnetic field.

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