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Quantum-mechanical expression for microscopic dielectric tensor in incommensurate phases

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Author(s): O.S.Kushnir | L.O.Lokot

Journal: Ukrainian Journal of Physical Optics
ISSN 1609-1833

Volume: 1;
Issue: 1;
Start page: 40;
Date: 2000;
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Keywords: insulator | dielectric permittivity tensor | incommensurate phase

ABSTRACT
Quantum-mechanical calculations for the dielectric permittivity tensor in incommensurately modulated ionic-type insulators are carried out. The microscopic Fourier components of the tensor are obtained. The role of different reciprocal lattice vectors in the optical response of crystal is clarified.
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