Towards an experimental measure of the number of metastable states in spin-glasses ?

Details Towards an experimental measure of the number of metastable states in spin-glasses ? Towards an experimental measure of the number of metastable states in spin-glasses ?

1993-03-12

arxiv.org/abs/cond-mat/9303023v1

J. Phys. I France 4, 139 (1994)

Physics

Condensed Matter

Saclay-S93/016

Scientific paper

10.1051/jp1:1994127

We show that an 'ergodic' time scale can be extracted from the aging experiments on spin-glasses. This is the time for which a significant fraction of the metastable states have been visited. Experiments suggest that the number of metastable states per independent subsystem is $\simeq 10^{12}-10^{14}$. For our insulating spin-glass $({\rm CdCr}_{1.7} {\rm In}_{0.3} {\rm S}_4)$ this number doubles when the temperature is lowered by 1K, but is roughly constant for the metallic sample (Ag:Mn 2.6%).

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