Ergodicity of the extended anisotropic 1D Heisenberg model: response at low temperatures

Details Ergodicity of the extended anisotropic 1D Heisenberg model: response at low temperatures Ergodicity of the extended anisotropic 1D Heisenberg model: response at low temperatures

2007-06-12

arxiv.org/abs/0706.1711v1

Journ. Magn. & Magn. Materials 310, e480 (2007)

Physics

Condensed Matter

Strongly Correlated Electrons

reported at the International Conference on Magnetism, August 20-25, 2006 Kyoto, Japan

Scientific paper

10.1016/j.jmmm.2006.10.428

We present the results of exact diagonalization calculations of the isolated and isothermal on-site static susceptibilities in the anisotropic extended Heisenberg model on a linear chain with periodic boundary conditions. Based on the ergodicity considerations we conclude that the isothermal susceptibility will diverge as $T\to 0$ both in finite clusters and in the bulk system in two non-ergodic regions of the phase diagram of the system.

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