Correlations in optical phonon spectra of complex solids

Authors
Fagas, G Fal'ko, VI Lambert, CJ Gefen, Y
Citation
G. Fagas et al., Correlations in optical phonon spectra of complex solids, PHYS REV B, 61(15), 2000, pp. 9851-9854
Citations number
20
Categorie Soggetti
Apllied Physucs/Condensed Matter/Materiales Science
Journal title
PHYSICAL REVIEW B
ISSN journal
10980121 → ACNP
Volume
61
Issue
15
Year of publication
2000
Pages
9851 - 9854
Database
ISI
SICI code
1098-0121(20000415)61:15<9851:CIOPSO>2.0.ZU;2-A
Abstract
Spectral correlations in the optical phonon spectrum of a solid with a comp lex unit cell are analyzed using the Wigner-Dyson statistical approach. Des pite the fact that all force constants are real, we find that the statistic s are predominantly of the GUE type depending on the location within the Br illouin zone of a crystal and the unit cell symmetry. Analytic and numerica l results for the crossover from GOE to GUE statistics are presented.