THE QUANTUM 2-D XXZ FERROMAGNET

Authors
CUCCOLI A TOGNETTI V VERRUCCHI P VAIA R
Citation
A. Cuccoli et al., THE QUANTUM 2-D XXZ FERROMAGNET, Journal of magnetism and magnetic materials, 140, 1995, pp. 1703-1704
Citations number
12
Categorie Soggetti
Material Science","Physics, Condensed Matter
Journal title
Journal of magnetism and magnetic materials → ACNP
ISSN journal
03048853
Volume
140
Year of publication
1995
Part
3
Pages
1703 - 1704
Database
ISI
SICI code
0304-8853(1995)140:<1703:TQ2XF>2.0.ZU;2-#
Abstract
The quantum easy-plane XXZ model is approached by the PQSCHA method, t hat reduces it to an effective classical model. Quantum fluctuations w eaken the effective exchange leading to a reduced Kosterlitz-Thouless transition temperature. Moreover, the weakening of the effective easy- plane anisotropy can even lead to a quantum mechanical suppression of the transition.