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Finite energy barriers in the random-bond Ising model

Morgenstern, Ingo ; Horner, H.
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Date of publication of this fulltext: 09 Aug 2010 12:01


Abstract

The statistical mechanics of finite L×L Ising square lattices in a field ±h of random sign is investigated numerically by a modified recursive transfer matrix method for 6<~L<~16. Our results are consistent with the absence of a spontaneous magnetization for h≠0 even in the ground state. The singularities occurring at T=0 in the range 0<~h<~4J, J being the exchange constant, are discussed in ...

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