INPLANE DYNAMICS OF THE CLASSICAL 2-DIMENSIONAL EASY-PLANE HEISENBERG-MODEL AT LOW-TEMPERATURES

Authors
MENEZES SL PIRES AST GOUVEA ME
Citation
Sl. Menezes et al., INPLANE DYNAMICS OF THE CLASSICAL 2-DIMENSIONAL EASY-PLANE HEISENBERG-MODEL AT LOW-TEMPERATURES, Physical review. B, Condensed matter, 47(18), 1993, pp. 12280-12283
Citations number
14
Categorie Soggetti
Physics, Condensed Matter
Journal title
Physical review. B, Condensed matter → ACNP
ISSN journal
01631829
Volume
47
Issue
18
Year of publication
1993
Pages
12280 - 12283
Database
ISI
SICI code
0163-1829(1993)47:18<12280:IDOTC2>2.0.ZU;2-P
Abstract
We have calculated the in-plane dynamical structure factor S(parallel- to)(q,omega) of the two-dimensional classical Heisenberg model with ea sy-plane anisotropy at low temperatures using the projection-operator technique. Beside the characteristic power-law singularity at the spin -wave frequency, we have found that S(parallel-to)(q,omega) diverges l ogarithmically as omega-->0 for finite values of q.