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arXiv · 2010.01214

Evidence for Temperature Chaos in Spin Glasses

Qiang Zhai·Raymond L. Orbach·Deborah Schlagel
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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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Qiang Zhai, Raymond L. Orbach, Deborah Schlagel. 2020-10-02. Evidence for Temperature Chaos in Spin Glasses. https://doi.org/10.1103/physrevb.105.014434

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