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dc.contributor.authorTonel, A. P.-
dc.contributor.authorDahmen, SR-
dc.contributor.authorFoerster, A.-
dc.contributor.authorMalvezzi, André Luiz-
dc.identifier.citationEurophysics Letters. Les Ulis Cedexa: E D P Sciences, v. 64, n. 1, p. 111-117, 2003.-
dc.description.abstractWe investigate the thermodynamics of an integrable spin ladder model which possesses a free parameter besides rung and leg couplings. The model is exactly solvable by means of the Bethe ansatz and exhibits a phase transition between a gapped and a gapless spin excitation spectrum. The magnetic susceptibility is obtained numerically and its dependence on the anisotropy parameter is determined. The spin gap obtained from the susceptibility curve and the one obtained from the Bethe ansatz equations are in very good agreement. Our results for the magnetic susceptibility fit well the experimental data for the organometallic compounds (5IAP)(2)CuBr4 . 2H(2)O (Landee C. P. et al., Phys. Rev. B, 63 (2001) 100402(R)) Cu-2(C5H12N2)(2)Cl-4 (Hayward C. A., Poilblanc D. and Levy L. P., Phys. Rev. B, 54 (1996) R12649, Chaboussant G. et al., Phys. Rev. Lett., 19 ( 1997) 925; Phys. Rev. B, 55 ( 1997) 3046.) and (C5H12N)(2)CuBr4 (Watson B. C. et al., Phys. Rev. Lett., 86 ( 2001) 5168) in the strong-coupling regime.en
dc.publisherE D P Sciences-
dc.sourceWeb of Science-
dc.titleMagnetic susceptibility of an exactly solvable anisotropic spin ladder systemen
dc.contributor.institutionUniversidade Federal do Rio Grande do Sul (UFRGS)-
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.description.affiliationUniv Fed Rio Grande do Sul, Inst Fis, Porto Alegre, RS, Brazil-
dc.description.affiliationUNESP, Dept Fis, Bauru, SP, Brazil-
dc.description.affiliationUnespUNESP, Dept Fis, Bauru, SP, Brazil-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofEurophysics Letters-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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