Magnetization Jump in the Spin-1/2 XXZ Chain with Next-Nearest-Neighbour Coupling

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The zero-temperature magnetization process of a one-dimensional S=1/2 spin system with next-nearest-neighbour coupling alpha and anisotropy delta is studied. There is a region in the parameter space where the magnetization has a jump at certain external field. The boundary of this region is determined. The two cases are distinguished according as alpha<1/4 or alpha>1/4. In the latter case, the energy dispersion of the low-lying excitations exhibits a double minimum structure.
4 pages, 7 eps figures, uses jpsj.sty

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Strongly Correlated Electrons, Statistical Mechanics

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http://salesiana.dossiersoluciones.com/handle/123456789/30013

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/cond-mat/9912066
 http://arxiv.org/abs/cond-mat/9912066

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arXiv