Spectral density of vibrational excitations in lattices with force-constant disorder

Authors
Taraskin, SN Elliott, SR
Citation
Sn. Taraskin et Sr. Elliott, Spectral density of vibrational excitations in lattices with force-constant disorder, PHIL MAG B, 81(9), 2001, pp. 1263-1272
Citations number
21
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHILOSOPHICAL MAGAZINE B-PHYSICS OF CONDENSED MATTER STATISTICAL MECHANICSELECTRONIC OPTICAL AND MAGNETIC PROPERTIES
ISSN journal
13642812 → ACNP
Volume
81
Issue
9
Year of publication
2001
Pages
1263 - 1272
Database
ISI
SICI code
1364-2812(200109)81:9<1263:SDOVEI>2.0.ZU;2-0
Abstract
Vector atomic vibrations are analysed in lattices with force-constant disor der. The width of the dynamic structure factor, averaged over momentum-tran sfer directions, is shown to scale linearly with the magnitude k of the mom entum transfer, in the majority of lattices, and as k(3) in highly symmetri c lattices (e.g. sc).