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cond-mat.stat-mech2001
Width of phonon states on defects of various dimensions
L. A. Falkovsky
We consider the localized phonon states created by defects of various geometries near the edge of an optical-phonon branch. The averaged Green's function is calculated to study the…
cond-mat.mtrl-sci2001
Coulomb effects in dynamics of polar lattices
L. A. Falkovsky
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 t…