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2001

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Si us plau utilitzeu sempre aquest identificador per citar o enllaçar aquest document: https://hdl.handle.net/2445/10879

Chaotic, memory, and cooling rate effects in spin glasses: Evaluation of the Edwards-Anderson model

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http://dx.doi.org/10.1103/PhysRevB.63.174412

Resum

We investigate chaotic, memory, and cooling rate effects in the three-dimensional Edwards-Anderson model by doing thermoremanent (TRM) and ac susceptibility numerical experiments and making a detailed comparison with laboratory experiments on spin glasses. In contrast to the experiments, the Edwards-Anderson model does not show any trace of reinitialization processes in temperature change experiments (TRM or ac). A detailed comparison with ac relaxation experiments in the presence of dc magnetic field or coupling distribution perturbations reveals that the absence of chaotic effects in the Edwards-Anderson model is a consequence of the presence of strong cooling rate effects. We discuss possible solutions to this discrepancy, in particular the smallness of the time scales reached in numerical experiments, but we also question the validity of the Edwards-Anderson model to reproduce the experimental results.

Matèries

Propietats magnètiques, Física estadística, Termodinàmica, Sistemes dinàmics diferenciables, Teories no lineals, Caos (Teoria de sistemes), Vidres de spin

Matèries (anglès)

Magnetic properties, Nonlinear dynamical systems, Statistical physics, Thermodynamics, Differentiable dynamical systems, Nonlinear theories, Chaotic behavior in systems, Spin glasses

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Articles publicats en revistes (Física de la Matèria Condensada)

Citació

PICCO, Marco, RICCI-TERSENGHI, Federico, RITORT FARRAN, Fèlix. Chaotic, memory, and cooling rate effects in spin glasses: Evaluation of the Edwards-Anderson model. _Physical Review B_. 2001. Vol. 63, núm. 17, pàgs. 174412-1-174412-12. [consulta: 31 de gener de 2026]. ISSN: 0163-1829. [Disponible a: https://hdl.handle.net/2445/10879]

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