Peculiarities in pseudo-transitions of a mixed spin-(1/2, 1) Ising–Heisenberg double-tetrahedral chain in an external magnetic field

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorSantos, Onofre Rojas-
Autor(es): dc.creatorStrečka, Jozef-
Autor(es): dc.creatorDerzhko, Oleg-
Autor(es): dc.creatorSouza, S. M. de-
Data de aceite: dc.date.accessioned2026-02-09T12:48:32Z-
Data de disponibilização: dc.date.available2026-02-09T12:48:32Z-
Data de envio: dc.date.issued2020-10-09-
Data de envio: dc.date.issued2020-10-09-
Data de envio: dc.date.issued2019-10-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br/handle/1/43381-
Fonte completa do material: dc.identifierhttps://arxiv.org/abs/1908.07286-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1168679-
Descrição: dc.descriptionRecently, it has been rigorously verified that several one-dimensional (1D) spin models may exhibit a peculiar pseudo-transition accompanied with anomalous response of thermodynamic quantities in a close vicinity of pseudo-critical temperature. In the present work we will introduce and exactly solve a mixed spin-(1/2,1) Ising–Heisenberg double-tetrahedral chain in an external magnetic field as another particular example of 1D lattice-statistical model with short-range interactions that displays a pseudo-transition of this type. The investigated model exhibits at zero temperature three ferrimagnetic phases, three frustrated phases, and one saturated paramagnetic phase. The ground-state phase diagram involves five unusual interfaces (phase boundaries), at which the residual entropy per site equals to a larger entropy of one of two coexisting phases. Four such interfaces are between a non-degenerate ferrimagnetic phase and a macroscopically degenerate frustrated phase, while one interface is between two non-degenerate ferrimagnetic phases. Though thermal excitations typically destroy all fingerprints of zero-temperature phase transitions of 1D lattice-statistical models with short-range forces, the mixed spin-(1/2,1) Ising–Heisenberg double-tetrahedral chain is quite robust with respect to thermal excitations and it displays peculiar pseudo-transitions close to all five aforementioned interfaces.-
Idioma: dc.languageen-
Publicador: dc.publisherInstitute of Physics (IOP)-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourceJournal of Physics: Condensed Matter-
Palavras-chave: dc.subjectResidual entropy-
Palavras-chave: dc.subjectPseudo-transitions-
Palavras-chave: dc.subjectQuasi-phases-
Palavras-chave: dc.subjectIsing–Heisenberg chain-
Palavras-chave: dc.subjectEntropia residual-
Palavras-chave: dc.subjectPseudo-transições-
Palavras-chave: dc.subjectQuase-fases-
Palavras-chave: dc.subjectModelo de Ising-Heisenberg-
Título: dc.titlePeculiarities in pseudo-transitions of a mixed spin-(1/2, 1) Ising–Heisenberg double-tetrahedral chain in an external magnetic field-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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