On the Ising Model with Strongly Anisotropic External Field |
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| Authors: | Nardi F R Olivieri E Zahradník M |
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| Institution: | (1) Dipartimento di Matematica, II Università di Roma Tor Vergata, Rome, Italy;(2) Faculty of Mathematics and Physics, Charles University, Prague, Czech Republic |
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| Abstract: | In this paper we analyze the equilibrium phase diagram of the two-dimensional ferromagnetic n.n. Ising model when the external field takes alternating signs on different rows. We show that some of the zero-temperature coexistence lines disappear at every positive sufficiently small temperature, whereas one (and only one) of them persists for sufficiently low temperature. |
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| Keywords: | Ising model anisotropic field phase diagram cluster expansion |
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