Growing timescales and lengthscales characterizing vibrations of amorphous solids

Berthier, L. ; Charbonneau, P. ; Jin, Y. ; Parisi, G. ; Seoane, B. ; Zamponi, F.

Resumen: Low-temperature properties of crystalline solids can be understood using harmonic perturbations around a perfect lattice, as in Debye’s theory. Low-temperature properties of amorphous solids, however, strongly depart from such descriptions, displaying enhanced transport, activated slow dynamics across energy barriers, excess vibrational modes with respect to Debye’s theory (i.e., a boson peak), and complex irreversible responses to small mechanical deformations. These experimental observations indirectly suggest that the dynamics of amorphous solids becomes anomalous at low temperatures. Here, we present direct numerical evidence that vibrations change nature at a well-defined location deep inside the glass phase of a simple glass former. We provide a real-space description of this transition and of the rapidly growing time- and lengthscales that accompany it. Our results provide the seed for a universal understanding of low-temperature glass anomalies within the theoretical framework of the recently discovered Gardner phase transition.

Idioma: Inglés

DOI: 10.1073/pnas.1607730113

Año: 2016

Publicado en: Proceedings of the National Academy of Sciences 113, 30 (2016), 8397-8401
ISSN: 0027-8424

Factor impacto JCR: 9.661 (2016)

Categ. JCR: MULTIDISCIPLINARY SCIENCES rank: 4 / 63 = 0.063 (2016) - Q1 - T1

Factor impacto SCIMAGO: 6.575 - Multidisciplinary (Q1)

Financiación: info:eu-repo/grantAgreement/EC/FP7/ 306845/EU/Statistical physics of dense particle systems in the absence of thermal fluctuations/D4PARTICLES
Financiación: info:eu-repo/grantAgreement/EC/H2020/654971/EU/Search for an experimental test of the mean-field theory of simple glasses/EXPMFSG
Financiación: info:eu-repo/grantAgreement/EC/H2020/694925/EU/Low Temperature Glassy Systems/LoTGlasSy
Financiación: info:eu-repo/grantAgreement/ES/MINECO/FIS2012-35719-C02

Tipo y forma: Artículo (Versión definitiva)