LATTICE-DYNAMICS OF ORDERED AND DISORDERED CU3AU WITH A TIGHT-BINDINGPOTENTIAL MODEL

Authors
CLERI F ROSATO V
Citation
F. Cleri et V. Rosato, LATTICE-DYNAMICS OF ORDERED AND DISORDERED CU3AU WITH A TIGHT-BINDINGPOTENTIAL MODEL, Philosophical magazine letters, 67(6), 1993, pp. 369-378
Citations number
20
Categorie Soggetti
Physics, Condensed Matter
Journal title
Philosophical magazine letters → ACNP
ISSN journal
09500839
Volume
67
Issue
6
Year of publication
1993
Pages
369 - 378
Database
ISI
SICI code
0950-0839(1993)67:6<369:LOOADC>2.0.ZU;2-0
Abstract
The phonon dispersion curves for both ordered and configurationally di sordered cubic phases of Cu3Au are calculated using force constants de rived from a many-body tight-binding potential. The derived phonon fre quency spectra are used to estimate the vibrational contribution to th e entropy difference between the two phases. A brief discussion concer ning the relative values of interatomic force constants is included.