Dynamic relaxation of a liquid cavity under amorphous boundary conditions
The growth of cooperatively rearranging regions was invoked long ago by Adam and Gibbs to explain the slowing down of glass-forming liquids. The lack of knowledge about the nature of the growing order, though, complicates the definition of an appropriate correlation function. One option is the point...
| Autores principales: | , , |
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| Formato: | Articulo |
| Lenguaje: | Inglés |
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2012
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| Acceso en línea: | http://sedici.unlp.edu.ar/handle/10915/98087 https://ri.conicet.gov.ar/11336/81913 https://aip.scitation.org/doi/10.1063/1.4720477 |
| Aporte de: |
| id |
I19-R120-10915-98087 |
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dspace |
| institution |
Universidad Nacional de La Plata |
| institution_str |
I-19 |
| repository_str |
R-120 |
| collection |
SEDICI (UNLP) |
| language |
Inglés |
| topic |
Física Ciencias Exactas Glass-forming liquids Cavity relaxation time |
| spellingShingle |
Física Ciencias Exactas Glass-forming liquids Cavity relaxation time Cavagna, A. Grigera, Tomás Sebastián Verrocchio, Paolo Dynamic relaxation of a liquid cavity under amorphous boundary conditions |
| topic_facet |
Física Ciencias Exactas Glass-forming liquids Cavity relaxation time |
| description |
The growth of cooperatively rearranging regions was invoked long ago by Adam and Gibbs to explain the slowing down of glass-forming liquids. The lack of knowledge about the nature of the growing order, though, complicates the definition of an appropriate correlation function. One option is the point-to-set (PTS) correlation function, which measures the spatial span of the influence of amorphous boundary conditions on a confined system. By using a swap Monte Carlo algorithm we measure the equilibration time of a liquid droplet bounded by amorphous boundary conditions in a model glass-former at low temperature, and we show that the cavity relaxation time increases with the size of the droplet, saturating to the bulk value when the droplet outgrows the point-to-set correlation length. This fact supports the idea that the point-to-set correlation length is the natural size of the cooperatively rearranging regions. On the other hand, the cavity relaxation time computed by a standard, nonswap dynamics, has the opposite behavior, showing a very steep increase when the cavity size is decreased. We try to reconcile this difference by discussing the possible hybridization between mode-coupling theory and activated processes, and by introducing a new kind of amorphous boundary conditions, inspired by the concept of frozen external state as an alternative to the commonly used frozen external configuration. |
| format |
Articulo Articulo |
| author |
Cavagna, A. Grigera, Tomás Sebastián Verrocchio, Paolo |
| author_facet |
Cavagna, A. Grigera, Tomás Sebastián Verrocchio, Paolo |
| author_sort |
Cavagna, A. |
| title |
Dynamic relaxation of a liquid cavity under amorphous boundary conditions |
| title_short |
Dynamic relaxation of a liquid cavity under amorphous boundary conditions |
| title_full |
Dynamic relaxation of a liquid cavity under amorphous boundary conditions |
| title_fullStr |
Dynamic relaxation of a liquid cavity under amorphous boundary conditions |
| title_full_unstemmed |
Dynamic relaxation of a liquid cavity under amorphous boundary conditions |
| title_sort |
dynamic relaxation of a liquid cavity under amorphous boundary conditions |
| publishDate |
2012 |
| url |
http://sedici.unlp.edu.ar/handle/10915/98087 https://ri.conicet.gov.ar/11336/81913 https://aip.scitation.org/doi/10.1063/1.4720477 |
| work_keys_str_mv |
AT cavagnaa dynamicrelaxationofaliquidcavityunderamorphousboundaryconditions AT grigeratomassebastian dynamicrelaxationofaliquidcavityunderamorphousboundaryconditions AT verrocchiopaolo dynamicrelaxationofaliquidcavityunderamorphousboundaryconditions |
| bdutipo_str |
Repositorios |
| _version_ |
1764820492612534273 |