Dean, D.S.Ritort Farran, Fèlix2010-01-252010-01-2520020163-1829https://hdl.handle.net/2445/10880The mean-field theory of a spin glass with a specific form of nearest- and next-nearest-neighbor interactions is investigated. Depending on the sign of the interaction matrix chosen we find either the continuous replica symmetry breaking seen in the Sherrington-Kirkpartick model or a one-step solution similar to that found in structural glasses. Our results are confirmed by numerical simulations and the link between the type of spin-glass behavior and the density of eigenvalues of the interaction matrix is discussed.11 p.application/pdfeng(c) The American Physical Society, 2002Vidres de spinPropietats magnètiquesSpin glassesMagnetic propertiesinfo:eu-repo/semantics/article514193info:eu-repo/semantics/openAccess