Modulated replica symmetry breaking schemes for antiferrimagnetic spin glasses

R. Oppermann (), D. Sherrington and M. Kiselev

The European Physical Journal B: Condensed Matter and Complex Systems, 2004, vol. 37, issue 2, 187-192

Abstract: We define modulated replica symmetry breaking (RSB) schemes which combine tree- and wave-like structures. A modulated scheme and unmodulated RSB are evaluated at 1-step level for a semiconductor model with antiferromagnetic Korenblit-Shender interaction. By comparison of the free energies we find evidence that a T=0 phase transition in the ferrimagnetic phase leads to a transition between the different RSB-schemes. An embedding factor of Parisi block matrices with sublattice-asymmetrical size is employed as a new variational parameter in the modulated scheme. Copyright EDP Sciences, Società Italiana di Fisica, Springer-Verlag 2004

Date: 2004
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DOI: 10.1140/epjb/e2004-00045-9

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