期刊
PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA
卷 113, 期 30, 页码 8397-8401出版社
NATL ACAD SCIENCES
DOI: 10.1073/pnas.1607730113
关键词
glass transition; disordered solids; Gardner transition; computer simulations; hard spheres
资金
- Alfred P. Sloan Foundation
- National Science Foundation (NSF) [DMR-1055586]
- Ministerio de Economia y Competitividad (MINECO) (Spain) [FIS2012-35719-C02]
- European Union's Horizon 2020 Research and Innovation Programme under the Marie Sklodowska-Curie Grant [654971]
- European Research Council (ERC) under the European Union's Seventh Framework Programme (FP7)/ERC [306845]
- Region Ile de France
- project Equip@Meso of the program Investissements d'Avenir [ANR-10-EQPX-29-01]
- ERC under the European Union's Horizon 2020 Research and Innovation Programme [694925]
- Marie Curie Actions (MSCA) [654971] Funding Source: Marie Curie Actions (MSCA)
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [1055586] Funding Source: National Science Foundation
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.
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