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

Content Provider	Semantic Scholar
Author	Strecka, Jozef Dely, Jan Čanová, Lucia
Copyright Year	2006
Abstract	Phase 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.
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Alternate Webpage(s)	http://arxiv.org/pdf/cond-mat/0611254v1.pdf
Alternate Webpage(s)	http://arxiv.org/pdf/cond-mat/0611254v2.pdf
Alternate Webpage(s)	https://arxiv.org/pdf/cond-mat/0611254v3.pdf
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article