Palassini, MatteoSales i Pardo, MartaRitort Farran, Fèlix2010-01-262010-01-2620030163-1829https://hdl.handle.net/2445/10920We present a numerical study of the order-parameter fluctuations for Ising spin glasses in three and four dimensions at very low temperatures and without an external field. Accurate measurements of two previously introduced parameters, A and G, show that the order parameter is not self-averaging, consistent with a zero-temperature thermal exponent value \theta' \simeq 0, and confirm the validity of the relation G=1/3 in the thermodynamic limit in the whole low-temperature phase, as predicted by stochastic stability arguments.6 p.application/pdfeng(c) The American Physical Society, 2003Vidres de spinTemperatures baixesPropietats magnètiquesSpin glassesLow temperaturesMagnetic propertiesinfo:eu-repo/semantics/article527638info:eu-repo/semantics/openAccess