Emergence of equilibrated liquid regions within the glass
Vila Costa, Ana (Universitat Autònoma de Barcelona. Departament de Física)
González Silveira, Marta (Institut Català de Nanociència i Nanotecnologia)
Rodríguez Tinoco, Cristian (Institut Català de Nanociència i Nanotecnologia)
Rodríguez-López, Marta (Institut Català de Nanociència i Nanotecnologia)
Rodríguez-Viejo, Javier (Institut Català de Nanociència i Nanotecnologia)

Additional title:	Revisiting the glass transition emergence of equilibrated regions within the glass
Date:	2023
Description:	6 pàg.
Abstract:	The conventional understanding of the glass transition is that the transition from glass to liquid appears as a dynamic process in which atoms or molecules relax cooperatively into the equilibrium phase. Here we show that-in contrast to this picture-isolated regions of liquid form within the glassy matrix and the nature of the glass transition at a given temperature depends on the ratio between the relaxation time of the glass, τglass, and the alpha relaxation time of the equilibrated liquid, τα. At temperatures at which τglass/τα is large, we observe that high-mobility regions transit directly into the equilibrated liquid and subsequently grow by dynamic facilitation before-or while-cooperative glass relaxation sets into play. On the contrary, at temperatures associated with smaller τglass/τα, the glass transition proceeds by cooperative relaxation dynamics throughout the material. This behaviour is independent of the experimental procedure or protocol used to produce the glass.
Grants:	Agencia Estatal de Investigación MAT2016-79759-R Agencia Estatal de Investigación PID2020-117409RB-I00 Agencia Estatal de Investigación SEV-2017-0706
Rights:	Aquest material està protegit per drets d'autor i/o drets afins. Podeu utilitzar aquest material en funció del que permet la legislació de drets d'autor i drets afins d'aplicació al vostre cas. Per a d'altres usos heu d'obtenir permís del(s) titular(s) de drets.
Language:	Anglès
Document:	Article ; recerca ; Versió acceptada per publicar
Published in:	Nature Physics, Vol. 19 Núm. 1 (2023) , p. 114-119, ISSN 1745-2481

DOI: 10.1038/s41567-022-01791-w

Postprint 19 p, 640.6 KB

Material complementari. Postprint 282.8 KB

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Research literature > UAB research groups literature > Research Centres and Groups (research output) > Experimental sciences > Catalan Institute of Nanoscience and Nanotechnology (ICN2)
Articles > Research articles
Articles > Published articles