On temperature chaos in Ising and XY Spin Glasses
arXiv:cond-mat/0311247 · doi:10.1209/epl/i2003-10261-5
Abstract
We argue that the chaotic temperature effect predicted in Ising spin glasses should be stronger when one considers continuous (XY, Heisenberg) kind of spins, due to bigger entropic fluctuations. We then discuss the behavior of 3d spin glasses using the Migdal-Kadanoff Renormalization Group for Ising and XY spins, where we show explicitly that the chaotic length scale, the length beyond which equilibrium configurations are completly reshuffled when one changes temperature, could be far smaller for XY than for Ising spins. These results could thus explain why experiments are seeing a stronger rejuvenation effect for continuous spins.
arXiv comment7 pages, 6 figures, accepted for publication
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- Temperature chaos in 3D Ising Spin Glasses is driven by rare events
- Absence of rejuvenation in a Superspin Glass
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- The Critical Properties of Two-dimensional Oscillator Arrays