Magnetic Susceptibility of an integrable anisotropic spin ladder system

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We investigate the thermodynamics of a spin ladder model which possesses a free parameter besides the rung and leg couplings. The model is exactly solved by 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. A connection with the compounds KCuCl3, Cu2(C5H12N2)2Cl4 and (C5H12N)2CuBr4 in the strong coupling regime is made and our results for the magnetic susceptibility fit the experimental data remarkably well.
12 pages, 12 figures included, submitted to Phys. Rev. B

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Statistical Mechanics

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http://salesiana.dossiersoluciones.com/handle/123456789/121285

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/0302336
 http://arxiv.org/abs/cond-mat/0302336
 EUROPHYSICS LETTERS 64 (1): 111-117 (2003)
 doi:10.1209/epl/i2003-00144-3

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