Phonons in chalcopyrite crystals within the force field approach

Authors
Lazewski, J Parlinski, K
Citation
J. Lazewski et K. Parlinski, Phonons in chalcopyrite crystals within the force field approach, PHYS ST S-B, 218(2), 2000, pp. 411-416
Citations number
14
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICA STATUS SOLIDI B-BASIC RESEARCH
ISSN journal
03701972 → ACNP
Volume
218
Issue
2
Year of publication
2000
Pages
411 - 416
Database
ISI
SICI code
0370-1972(200004)218:2<411:PICCWT>2.0.ZU;2-J
Abstract
The lattice dynamics of chalcopyrite crystals AgGaS2, AgGaSe2, AgGaTe2, CdG eAs2 and CdGeP2 have been studied within the force field approach. The latt ice constants are derived from minimization of the unit cell potential and they agree within 1.5% with the experimental ones. The calculated interatom ic forces were used by the direct method, which allowed to find the phonon dispersion curves and phonon density of states fur these crystals. The calc ulated phonon frequencies for AgGaSe2 fit quite well to the inelastic neutr on scattering data.