DENSITY-OF-STATES OF LOCALIZED PHONONS IN A PINNED WIGNER CRYSTAL

Authors
ALEINER IL RUZIN IM
Citation
Il. Aleiner et Im. Ruzin, DENSITY-OF-STATES OF LOCALIZED PHONONS IN A PINNED WIGNER CRYSTAL, Physical review letters, 72(7), 1994, pp. 1056-1059
Citations number
15
Categorie Soggetti
Physics
Journal title
Physical review letters → ACNP
ISSN journal
00319007
Volume
72
Issue
7
Year of publication
1994
Pages
1056 - 1059
Database
ISI
SICI code
0031-9007(1994)72:7<1056:DOLPIA>2.0.ZU;2-Q
Abstract
Using the method of optimal fluctuation, we investigate the asymptotic behavior of the phonon density of states in the low-frequency limit o mega -> 0. If the pinning potential is not too strong, both the densit y of states g(omega) and the ac conductivity at zero temperature sigma (omega) are found to be proportional to omega(4). This power law is va lid in both one- and two-dimensional crystal and does not change in th e presence of magnetic field.