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dc.creatorCarvalho, I. M.-
dc.creatorTorrico, J.-
dc.creatorSouza, S. M. de-
dc.creatorRojas, M.-
dc.creatorRojas, O.-
dc.date.accessioned2019-06-28T16:41:25Z-
dc.date.available2019-06-28T16:41:25Z-
dc.date.issued2018-11-01-
dc.identifier.citationCARVALHO, I. M. et al. Quantum entanglement in the neighborhood of pseudo-transition for a spin-1/2 Ising-XYZ diamond chain. Journal of Magnetism and Magnetic Materials, Amsterdam, v. 465, p. 323-327, 1 Nov. 2018.pt_BR
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0304885317335114#!pt_BR
dc.identifier.urihttp://repositorio.ufla.br/jspui/handle/1/35021-
dc.description.abstractRecently has been observed for some one-dimensional models that exhibit unexpected pseudo-transitions and quasi-phases. This pseudo-transition resembles a first- and second-order phase transition simultaneously. One of those models is the spin-1/2 Ising-XYZ diamond chain, composed of Ising spin particles at the nodal sites and the Heisenberg spin particles at the interstitial sites. Where we assume Ising-type interaction between the nodal and interstitial sites, the Heisenberg-type interaction between interstitial sites, and with an external magnetic field applied along the z-axis. This model presents an exact analytical solution applying the transfer matrix technique, which shows 3 phases at zero temperature in the vicinity of pseudo-transition. The pseudo-transition separates quasi-phases, these quasi-phases still hold at a finite temperature most of the pattern configurations of a true phase at zero temperature. Here we study the quantum entanglement of pair spin particles in the quasi-phase regions, which can be measured through the concurrence. Then we observe an unexpected behavior in the concurrence, that is below pseudo-critical temperature the concurrence remains almost constant up to pseudo-critical temperature, but above the pseudo-critical temperature, the concurrence behaves as for the standard one-dimensional spin models. Further, we consider the entropy behavior of the system, below pseudo-critical temperature the entropy becomes almost null, while above pseudo-critical temperature the system exhibits standard behavior as for ordinary one-dimensional spin models.pt_BR
dc.languageen_USpt_BR
dc.publisherElsevierpt_BR
dc.rightsrestrictAccesspt_BR
dc.sourceJournal of Magnetism and Magnetic Materialspt_BR
dc.subjectQuantum entanglementpt_BR
dc.subjectEntropypt_BR
dc.subjectEmaranhamento quânticopt_BR
dc.subjectEntropiapt_BR
dc.titleQuantum entanglement in the neighborhood of pseudo-transition for a spin-1/2 Ising-XYZ diamond chainpt_BR
dc.typeArtigopt_BR
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