EVALUATION OF THE DISPLACEMENT-DISPLACEMENT CORRELATION-FUNCTION OF AONE-DIMENSIONAL CRYSTAL - A COMPARISON OF THE RESULTS OF PERTURBATION-THEORY WITH THE MORI-DUPUIS METHOD

Authors
FREIDKIN ES HORTON GK COWLEY ER
Citation
Es. Freidkin et al., EVALUATION OF THE DISPLACEMENT-DISPLACEMENT CORRELATION-FUNCTION OF AONE-DIMENSIONAL CRYSTAL - A COMPARISON OF THE RESULTS OF PERTURBATION-THEORY WITH THE MORI-DUPUIS METHOD, Physical review. B, Condensed matter, 52(5), 1995, pp. 3322-3332
Citations number
27
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
52
Issue
5
Year of publication
1995
Pages
3322 - 3332
Database
ISI
SICI code
0163-1829(1995)52:5<3322:EOTDCO>2.0.ZU;2-T
Abstract
We calculate the spectral shape of the displacement-displacement corre lation function of a one-dimensional chain of atoms interacting throug h a nearest-neighbor potential. We make use of the perturbation treatm ent developed by Maradudin and Fein. Our calculations are parallel to the corresponding work done using the frequency moments method. As exp ected the two methods agree best at low temperatures.