Slowing down of spin glass correlation length growth: Simulations meet experiments

Abstract

The growth of the spin glass correlation length has been measured as a function of the waiting time ${t}_{\mathrm{w}}$ on a single crystal of CuMn (6 at. %), reaching values $\ensuremath{\xi}\ensuremath{\sim}150$ nm, larger than any other glassy correlation length measured to date. We find an aging rate $dln{t}_{\mathrm{w}}/dln\ensuremath{\xi}$ larger than found in previous measurements, which evinces a dynamic slowing down as $\ensuremath{\xi}$ grows. Our measured aging rate is compared with simulation results by the Janus Collaboration. After critical effects are taken into account, we find excellent agreement with the Janus data.