Electronic-structure theory of crystalline insulators under homogeneous electric field

Details Electronic-structure theory of crystalline insulators under homogeneous electric field Electronic-structure theory of crystalline insulators under homogeneous electric field

2003-02-18

arxiv.org/abs/cond-mat/0302353v2

Physics

Condensed Matter

Materials Science

7 pages, 4 figures

Scientific paper

10.1103/PhysRevB.69.085117

Based on the conventional energy band theory, an approach is presented to describe the electronic structure of crystalline insulators in the presence of a finite homogeneous electric field. The expression of polarization is derived which extends the ``Berry-phase'' theory of polarization to nonzero fields. The characteristics of the solutions are studied in details and the associations with the existing perturbation theories and computational schemes are discussed.

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