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arXiv · 1010.0634

Evidence against an Almeida-Thouless line in disordered systems of Ising dipoles

Julio F. Fernandez
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Abstract

By tempered Monte Carlo simulations, an Almeida-Thouless (AT) phase-boundary line in site-diluted Ising spin systems is searched for. Spins interact only through dipolar fields and occupy a small fraction of lattice sites. The spin-glass susceptibility of these systems and of the Sherrington-Kirkpatrick model are compared. The correlation length as a function of system size and temperature is also studied. The results obtained are contrary to the existence of an AT line.

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BibTeXRIS

Julio F. Fernandez. 2010-10-04. Evidence against an Almeida-Thouless line in disordered systems of Ising dipoles. https://doi.org/10.1103/physrevb.82.144436

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