Ageing and dynamical scaling in the critical Ising spin glass

TL;DR

This paper investigates the ageing dynamics of 3D and 4D critical Ising spin glasses with different disorder types, revealing universal scaling behavior but disorder-dependent exponents and fluctuation-dissipation ratios.

Contribution

It demonstrates that the ageing phenomenology in critical Ising spin glasses mirrors that of non-disordered magnets, with new insights into disorder-dependent critical exponents.

Findings

Universal ageing scaling observed in spin glasses.

Non-equilibrium exponents depend on disorder distribution.

Universal limit fluctuation-dissipation ratio varies with disorder.

Abstract

The non-equilibrium ageing behaviour of the 3D and 4D critical Ising spin glass is studied for both binary and gaussian disorder. The same phenomenology of the time-dependent scaling as in non-disordered magnets is found but the non-equilibrium exponents and the universal limit fluctuation-dissipation ratio depend on the distribution of the coupling constants.