Quantum to classical crossover in the 2D easy-plane XXZ model

Please use this identifier to cite or link to this item: http://dspace.mediu.edu.my:8181/xmlui/handle/123456789/3094

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DC Field	Value	Language
dc.creator	Fehske H.	-
dc.creator	Schindelin C.	-
dc.creator	Weiße A.	-
dc.creator	Büttner H.	-
dc.creator	Ihle D.	-
dc.date	2000	-
dc.date.accessioned	2013-05-30T00:27:37Z	-
dc.date.available	2013-05-30T00:27:37Z	-
dc.date.issued	2013-05-30	-
dc.identifier	http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-97332000000400015	-
dc.identifier	http://www.doaj.org/doaj?func=openurl&genre=article&issn=01039733&date=2000&volume=30&issue=4&spage=720	-
dc.identifier.uri	http://koha.mediu.edu.my:8181/jspui/handle/123456789/3094	-
dc.description	Ground-state and thermodynamic properties of the spin-1/2 two-dimensional easy-plane XXZ model are investigated by both a Green's-function approach and by Lanczos diagonalization on lattices with up to 36 sites. We calculate the spatial and temperature dependences of various spin correlation functions, as well as the wave-vector dependence of the spin susceptibility for all anisotropy parameters delta. In the easy plane ferromagnetic region (-1 < delta < 0), the longitudinal correlators of spins at distance r change sign at a nite temperature T0 (delta, r). This transition, observed in the 2D case for the first time, can be interpreted as a quantum to classical crossover.	-
dc.publisher	Sociedade Brasileira de Física	-
dc.source	Brazilian Journal of Physics	-
dc.title	Quantum to classical crossover in the 2D easy-plane XXZ model	-
Appears in Collections:	Physics and Astronomy

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