Evidence for Temperature Chaos in Spin Glasses

Abstract

We study the field cooled magnetization of a CuMn spin glass under temperature perturbations. The $T$-cycling curves are compared with the reference curve without temperature cycling. There is a crossover from the cumulative aging region to noncumulative aging region as the temperature change is increased. The cumulative aging range scales with the chaos length ${\ell }_{\mathrm{c}}$, becoming comparable to the correlation length, $\xi$, at the crossover boundary. The extracted chaos exponent, $\zeta =1.1$, is in agreement with theoretical predictions. Our results strongly suggest temperature chaos exists in real spin glasses system.

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• Quantifying memory in spin glasses
• Memory and Rejuvenation in Glassy Systems
• Nature of temperature chaos in spin glasses
• Ground state interface exponents of the diluted Sherrington-Kirkpatrick spin glass
• Interplay between aging and rejuvenation in spin glasses