QUANTUM BEREZINSKII-KOSTERLITZ-THOULESS TRANSITION IN SQUARE-LATTICE MAGNETS WITH EASY-PLANE ANISOTROPY

Authors
CAPRIOTTI L CUCCOLI A TOGNETTI V VAIA R VERRUCCHI P
Citation
L. Capriotti et al., QUANTUM BEREZINSKII-KOSTERLITZ-THOULESS TRANSITION IN SQUARE-LATTICE MAGNETS WITH EASY-PLANE ANISOTROPY, Physica. D, 119(1-2), 1998, pp. 68-72
Citations number
20
Categorie Soggetti
Physycs, Mathematical",Physics,"Physycs, Mathematical
Journal title
Physica. D → ACNP
ISSN journal
01672789
Volume
119
Issue
1-2
Year of publication
1998
Pages
68 - 72
Database
ISI
SICI code
0167-2789(1998)119:1-2<68:QBTISM>2.0.ZU;2-U
Abstract
We consider the quantum easy-plane Heisenberg magnet on the square lat tice. After the introduction of a suitable classical effective Hamilto nian, computer simulations, both for ferro- and antiferromagnets, were performed to obtain the spin correlation lengths. The effects of quan tum fluctuations are quantitatively evaluated and discussed for differ ent values of the spin, in a broad range of temperatures, above the Be rezinskii-Kosterlitz-Thouless transition. (C) 1998 Published by Elsevi er Science B.V.