Coulomb effects in dynamics of polar lattices
Materials Science
2009-11-07 v1
Abstract
Zone-center phonon frequencies of polar lattices are calculated for uniaxial crystals from the symmetry arguments. Long-range Coulomb forces and crystal anisotropy are explicitly taken into account. Free-carrier contributions into a dielectric constant are included. The angular dispersion of optical-phonon modes is compared with data for hexagonal 6H-SiC politype.
Cite
@article{arxiv.cond-mat/0101050,
title = {Coulomb effects in dynamics of polar lattices},
author = {L. A. Falkovsky},
journal= {arXiv preprint arXiv:cond-mat/0101050},
year = {2009}
}
Comments
9 pages, 1 figure, to be published in JETP, issue 5, 2001