Fluctuation-dissipation ratio of the Heisenberg spin glass

Details Fluctuation-dissipation ratio of the Heisenberg spin glass Fluctuation-dissipation ratio of the Heisenberg spin glass

2002-12-25

arxiv.org/abs/cond-mat/0212591v2

Phys. Rev. Letters 90, 237201 (2003)

Physics

Condensed Matter

Disordered Systems and Neural Networks

Inset added to Fig.1. Minor change made in the text. To appear in PRL

Scientific paper

10.1103/PhysRevLett.90.237201

Fluctuation-dissipation (FD) relation of the three-dimensional Heisenberg spin glass with weak random anisotropy is studied by off-equilibrium Monte Carlo simulation. Numerically determined FD ratio exhibits a ``one-step-ike''behavior, the effective temperature of the spin-glass state being about twice the spin-glass transition temperature, $T_{{\rm eff}}\simeq 2T_g$, irrespective of the bath temperature. The results are discussed in conjunction with the recent experiment by Herisson and Ocio, and with the chirality scenario of spin-glass transition.

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