Phase diagram of the spin-1 XXZ Heisenberg ferromagnet with a single-ion anisotropy

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dc.creatorStrecka, Jozef
dc.creatorDely, Jan
dc.creatorCanova, Lucia
dc.date2006-11-09
dc.date2007-09-04
dc.date.accessioned2026-07-07T09:52:39Z
dc.date.available2026-07-07T09:52:39Z
dc.descriptionPhase diagram of the spin-1 quantum Heisenberg model with both exchange as well as single-ion anisotropy is constructed within the framework of pair approximation formulated as a variational procedure based on the Gibbs-Bogoliubov inequality. In this form adapted variational approach is used to obtain the results equivalent with the Oguchi's pair approximation. It is shown that the single-ion anisotropy induces a tricritical behaviour in the considered model system and a location of tricritical points is found in dependence on the exchange anisotropy strength.
dc.description12 pages, 3 figures, preprint submitted to Chin. J. Phys
dc.identifierhttps://arxiv.org/abs/cond-mat/0611254
dc.identifierhttp://arxiv.org/abs/cond-mat/0611254
dc.identifierChinese J. Phys 46 (2008) 329
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/165673
dc.subjectStatistical Mechanics
dc.titlePhase diagram of the spin-1 XXZ Heisenberg ferromagnet with a single-ion anisotropy
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