Abstract
We study a hierarchical model for interfaces in a random-field ferromagnet. We prove that in dimensionD>3, at low temperatures and for weak disorder, such interfaces are rigid. Our proof uses renormalization group transformations for stochastic sequences.
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Bovier, A., Külske, C. Stability of hierarchical interfaces in a random field model. J Stat Phys 69, 79–110 (1992). https://doi.org/10.1007/BF01053784
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DOI: https://doi.org/10.1007/BF01053784