THE EFFECT OF ANHARMONICITIES ON THE ABSORPTION-SPECTRUM OF A DIATOMIC LINEAR-CHAIN WITHIN A CENTRAL FORCE MODEL

Authors
HELD T PFEIFFER I
Citation
T. Held et I. Pfeiffer, THE EFFECT OF ANHARMONICITIES ON THE ABSORPTION-SPECTRUM OF A DIATOMIC LINEAR-CHAIN WITHIN A CENTRAL FORCE MODEL, Physica status solidi. b, Basic research, 181(2), 1994, pp. 363-372
Citations number
10
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physica status solidi. b, Basic research → ACNP
ISSN journal
03701972
Volume
181
Issue
2
Year of publication
1994
Pages
363 - 372
Database
ISI
SICI code
0370-1972(1994)181:2<363:TEOAOT>2.0.ZU;2-4
Abstract
Closed-form expressions for the Fourier-transformed anharmonic force c onstants of a diatomic linear chain within a central force model are o btained. Some differences compared to those expressions obtained by so me other authors, especially in Peierls' approximation, are discussed and illustrated by numerical calculations of the linewidth and frequen cy shift of the ''reststrahlen'' peak of a KCl crystal up to second or der of the perturbation theory.