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dc.creatorRodrigues, F. C.-
dc.creatorSouza, S. M. de-
dc.creatorRojas, Onofre-
dc.date.accessioned2019-08-29T13:26:48Z-
dc.date.available2019-08-29T13:26:48Z-
dc.date.issued2017-04-
dc.identifier.citationRODRIGUES, F. C.; SOUZA, S. M. de; ROJAS, O. Geometrically frustrated Cairo pentagonal lattice stripe with ising and heisenberg exchange interactions. Annals of Physics, [S.l.], v. 379, p. 1-12, Apr. 2017.pt_BR
dc.identifier.urihttps://www.sciencedirect.com/science/article/pii/S0003491617300532pt_BR
dc.identifier.urihttp://repositorio.ufla.br/jspui/handle/1/36520-
dc.description.abstractMotivated by the recent discoveries of some compounds such as the which crystallizes in an orthorhombic crystal structure with the ions, and iron-based oxyfluoride compounds following the pattern of Cairo pentagonal structure, among some other compounds. We propose a model for one stripe of the Cairo pentagonal Ising–Heisenberg lattice, one of the edges of a pentagon is different, and this edge will be associated with a Heisenberg exchange interaction, while the Ising exchange interactions will associate the other edges. We study the phase transition at zero temperature, illustrating five phases: a ferromagnetic phase (FM), a dimer antiferromagnetic (DAF), a plaquette antiferromagnetic (PAF), a typical antiferromagnetic (AFM) and a peculiar frustrated phase (FRU) where two types of frustrated states with the same energy coexist. To obtain the partition function of this model, we use the transfer matrix approach and following the eight vertex model notation. Using this result we discuss the specific heat, internal energy and entropy as a function of the temperature, and we can observe some unexpected behavior in the low-temperature limit, such as anomalous double peak in specific heat due to the existence of three phase (FRU, PAF(AFM) and FM) transitions occurring in a close region to each other. Consequently, the low-lying energy thermal excitation generates this double anomalous peak, and we also discuss the internal energy at the low temperature limit, where this double peak curve occurs. Some properties of our result were compared with two dimensional Cairo pentagonal lattices, as well as orthogonal dimer plaquette Ising–Heisenberg chain.pt_BR
dc.languageen_USpt_BR
dc.publisherElsevierpt_BR
dc.rightsrestrictAccesspt_BR
dc.sourceAnnals of Physicspt_BR
dc.subjectPentagonal stripept_BR
dc.subjectIsing–Heisenberg modelpt_BR
dc.subjectGeometric spin frustrationpt_BR
dc.titleGeometrically frustrated Cairo pentagonal lattice stripe with ising and heisenberg exchange interactionspt_BR
dc.typeArtigopt_BR
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