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- Evidence for a disordered critical point in a glass-forming liquid doi link

Auteur(s): Berthier L., Jack Robert L.

(Article) Publié: Physical Review Letters, vol. 114 p.205701 (2015)
Texte intégral en Openaccess : arxiv


Ref HAL: hal-01157941_v1
Ref Arxiv: 1503.08576
DOI: 10.1103/PhysRevLett.114.205701
WoS: 000354928700005
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Résumé:

Using computer simulations of an atomistic glass-forming liquid, we investigate the fluctuations of the overlap between a fluid configuration and a quenched reference system. We find that large fluctuations of the overlap develop as temperature decreases, consistent with the existence of the random critical point that is predicted by effective field theories. We discuss the scaling of fluctuations near the presumed critical point, comparing the observed behaviour with that of the random-field Ising model. We argue that this critical point directly reveals the existence of an interfacial tension between amorphous metastable states, a quantity relevant both for equilibrium relaxation and for nonequilibrium melting of stable glass configurations.



Commentaires: 4 figs, 5 pages. Réf Journal: Phys. Rev. Lett. 114, 205701 (2015)