Please use this identifier to cite or link to this item: http://repositorio.ufla.br/jspui/handle/1/45503
Title: Spin-phonon coupling induced frustration in the exactly solved spin-1/2 Ising model on a decorated planar lattice
Keywords: Ising model
Spin-phonon coupling
Spin frustration
Specific heat
Exact results
Issue Date: 2-Jan-2012
Publisher: Elsevier
Citation: STREČKA, J.; ROJAS, O.; SOUZA, S. M. de. Spin-phonon coupling induced frustration in the exactly solved spin-1/2 Ising model on a decorated planar lattice. Physics Letters A, [S.l.], v. 376, n. 3, p. 197-202, Jan. 2012. DOI: 10.1016/j.physleta.2011.11.008.
Abstract: Spin-1/2 Ising model with a spin-phonon coupling on decorated planar lattices partially amenable to lattice vibrations is examined using the decoration-iteration transformation and harmonic approximation. It is shown that the magnetoelastic coupling gives rise to an effective antiferromagnetic next-nearest-neighbour interaction, which competes with the nearest-neighbour interaction and is responsible for a frustration of decorating spins. A strong enough spin-phonon coupling consequently leads to an appearance of striking partially ordered and partially disordered phase, where a perfect antiferromagnetic alignment of nodal spins is accompanied with a complete disorder of decorating spins. Thermal dependences of the specific heat are explored in detail.
URI: https://www.sciencedirect.com/science/article/abs/pii/S0375960111013478
http://repositorio.ufla.br/jspui/handle/1/45503
Appears in Collections:DFI - Artigos publicados em periódicos

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