Spin frustration of a spin-1/2 Ising-Heisenberg three-leg tube as an indispensable ground for thermal entanglement

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MetadadosDescriçãoIdioma
Autor(es): dc.creatorStrečka, Jozef-
Autor(es): dc.creatorAlécio, Raphael Cavalcante-
Autor(es): dc.creatorLyra, Marcelo L.-
Autor(es): dc.creatorRojas, Onofre-
Data de aceite: dc.date.accessioned2026-02-09T12:51:13Z-
Data de disponibilização: dc.date.available2026-02-09T12:51:13Z-
Data de envio: dc.date.issued2019-08-27-
Data de envio: dc.date.issued2019-08-27-
Data de envio: dc.date.issued2016-07-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br/handle/1/36461-
Fonte completa do material: dc.identifierhttps://www.sciencedirect.com/science/article/pii/S0304885316301925-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1169549-
Descrição: dc.descriptionThe spin-1/2 Ising–Heisenberg three-leg tube composed of the Heisenberg spin triangles mutually coupled through the Ising inter-triangle interaction is exactly solved in a zero magnetic field. By making use of the local conservation for the total spin on each Heisenberg spin triangle the model can be rigorously mapped onto a classical composite spin-chain model, which is subsequently exactly treated through the transfer-matrix method. The ground-state phase diagram, correlation functions, concurrence, Bell function, entropy and specific heat are examined in detail. It is shown that the spin frustration represents an indispensable ground for a thermal entanglement, which is quantified by the quantum concurrence. The specific heat displays diverse temperature dependences, which may include a sharp low-temperature peak mimicking a temperature-driven first-order phase transition. It is convincingly evidenced that this anomalous peak originates from massive thermal excitations from the doubly degenerate ground state towards an excited state with a high macroscopic degeneracy due to chiral degrees of freedom of the Heisenberg spin triangles.-
Idioma: dc.languageen-
Publicador: dc.publisherElsevier-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourceJournal of Magnetism and Magnetic Materials-
Palavras-chave: dc.subjectIsing-Heisenberg tube-
Palavras-chave: dc.subjectSpin frustration-
Palavras-chave: dc.subjectThermal entanglement-
Palavras-chave: dc.subjectChirality-
Título: dc.titleSpin frustration of a spin-1/2 Ising-Heisenberg three-leg tube as an indispensable ground for thermal entanglement-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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