Abstract
We consider spin systems in two dimensions having the discrete symmetry group Z N . We give a bound on the spontaneous magnetization for such systems which reduces to the classical Mermin-Wager argument as N goes to infinity.
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Research supported in part by NSF PHY 78-23952.
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de Angelis, G.F., de Falco, D. An estimate on the large N behavior of Z N spin systems in two dimensions. Lett Math Phys 5, 475–479 (1981). https://doi.org/10.1007/BF00408128
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DOI: https://doi.org/10.1007/BF00408128