Competition of Ferromagnetic and Antiferromagnetic Order in the Spin-1/2 XXZ Chain at Finite Temperature

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An analytical study is presented of the crossover in the gapless attractive XXZ chain from antiferromagnetic to ferromagnetic behaviour at low to high temperature, respectively. In particular, an analytic formula for the crossover in the long distance asymptotics and explicit results for the nearest-neighbour longitudinal correlation are obtained. We also provide results for the specific heat and magnetic susceptibility for various anisotropies.
15 pages Latex

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Condensed Matter

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http://salesiana.dossiersoluciones.com/handle/123456789/28711

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/9810278
 http://arxiv.org/abs/cond-mat/9810278

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arXiv