ANHARMONIC IMPURITY MODES IN A 1-D LATTICE WITH 2-BODY POTENTIALS

Authors
KISELEV SA BICKHAM SR SIEVERS AJ
Citation
Sa. Kiselev et al., ANHARMONIC IMPURITY MODES IN A 1-D LATTICE WITH 2-BODY POTENTIALS, Physics letters. A, 184(3), 1994, pp. 255-259
Citations number
10
Categorie Soggetti
Physics
Journal title
Physics letters. A → ACNP
ISSN journal
03759601
Volume
184
Issue
3
Year of publication
1994
Pages
255 - 259
Database
ISI
SICI code
0375-9601(1994)184:3<255:AIMIA1>2.0.ZU;2-H
Abstract
The dynamics of a light impurity in a 1-D monatomic lattice with stand ard two-body potentials is studied. For sufficiently large amplitude t he frequency crosses into the plane wave spectrum and the localized im purity mode becomes a resonant mode. A localized de expansion of the l attice around the impurity accompanies the vibrational excitation in e ither case.