Low-temperature pseudo-phase-transition in an extended Hubbard diamond chain

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.creatorRojas, Onofre-
Autor(es): dc.creatorSouza, S. M. de-
Autor(es): dc.creatorTorrico, Jordana-
Autor(es): dc.creatorVeríssimo, L. M.-
Autor(es): dc.creatorPereira, M. S. S.-
Autor(es): dc.creatorLyra, M. L.-
Data de aceite: dc.date.accessioned2026-02-09T12:53:03Z-
Data de disponibilização: dc.date.available2026-02-09T12:53:03Z-
Data de envio: dc.date.issued2022-01-24-
Data de envio: dc.date.issued2022-01-24-
Data de envio: dc.date.issued2021-04-14-
Fonte completa do material: dc.identifierhttps://repositorio.ufla.br/handle/1/49003-
Fonte completa do material: dc.identifierhttps://journals.aps.org/pre/abstract/10.1103/PhysRevE.103.042123-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/capes/1170175-
Descrição: dc.descriptionWe consider the extended Hubbard diamond chain with an arbitrary number of particles driven by chemical potential. The interaction between dimer diamond chain and nodal couplings is considered in the atomic limit (no hopping), whereas the dimer interaction includes the hopping term. We demonstrate that this model exhibits a pseudo-transition effect in the low-temperature regime. Here, we explore the pseudo-transition rigorously by analyzing several physical quantities. The internal energy and entropy depict sudden, although continuous, jumps which closely resembles discontinuous or first-order phase-transition. At the same time, the correlation length and specific heat exhibit astonishing strong sharp peaks quite similar to a second-order phase-transition. We associate the ascending and descending parts of the peak with power-law “pseudo-critical” exponents. We determine the pseudo-critical exponents in the temperature range where these peaks are developed, namely, ν=1 for the correlation length and α=3 for the specific heat. We also study the behavior of the electron density and isothermal compressibility around the pseudo-critical temperature.-
Idioma: dc.languageen-
Publicador: dc.publisherAmerican Physical Society (APS)-
Direitos: dc.rightsrestrictAccess-
???dc.source???: dc.sourcePhysical Review E-
Palavras-chave: dc.subjectHubbard diamond chain-
Palavras-chave: dc.subjectPhase transitions-
Palavras-chave: dc.subjectLow-temperature-
Título: dc.titleLow-temperature pseudo-phase-transition in an extended Hubbard diamond chain-
Tipo de arquivo: dc.typeArtigo-
Aparece nas coleções:Repositório Institucional da Universidade Federal de Lavras (RIUFLA)

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