| Title |
Dynamic phase coexistence in glass–forming liquids
|
|---|---|
| Published in |
Scientific Reports, July 2015
|
| DOI | 10.1038/srep11770 |
| Pubmed ID | |
| Authors |
Raffaele Pastore, Antonio Coniglio, Massimo Pica Ciamarra |
| Abstract |
One of the most controversial hypotheses for explaining the heterogeneous dynamics of glasses postulates the temporary coexistence of two phases characterized by a high and by a low diffusivity. In this scenario, two phases with different diffusivities coexist for a time of the order of the relaxation time and mix afterwards. Unfortunately, it is difficult to measure the single-particle diffusivities to test this hypothesis. Indeed, although the non-Gaussian shape of the van-Hove distribution suggests the transient existence of a diffusivity distribution, it is not possible to infer from this quantity whether two or more dynamical phases coexist. Here we provide the first direct observation of the dynamical coexistence of two phases with different diffusivities, by showing that in the deeply supercooled regime the distribution of the single-particle diffusivities acquires a transient bimodal shape. We relate this distribution to the heterogeneity of the dynamics and to the breakdown of the Stokes-Einstein relation, and we show that the coexistence of two dynamical phases occurs up to a timescale growing faster than the relaxation time on cooling, for some of the considered models. Our work offers a basis for rationalizing the dynamics of supercooled liquids and for relating their structural and dynamical properties. |
X Demographics
The data shown below were collected from the profiles of 2 X users who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Italy | 1 | 50% |
| Unknown | 1 | 50% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Scientists | 1 | 50% |
| Members of the public | 1 | 50% |
Mendeley readers
The data shown below were compiled from readership statistics for 43 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Chile | 1 | 2% |
| Vietnam | 1 | 2% |
| Hong Kong | 1 | 2% |
| Brazil | 1 | 2% |
| Israel | 1 | 2% |
| Spain | 1 | 2% |
| Unknown | 37 | 86% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 10 | 23% |
| Researcher | 9 | 21% |
| Professor > Associate Professor | 7 | 16% |
| Professor | 4 | 9% |
| Student > Bachelor | 3 | 7% |
| Other | 5 | 12% |
| Unknown | 5 | 12% |
| Readers by discipline | Count | As % |
|---|---|---|
| Physics and Astronomy | 22 | 51% |
| Materials Science | 5 | 12% |
| Biochemistry, Genetics and Molecular Biology | 3 | 7% |
| Chemical Engineering | 2 | 5% |
| Engineering | 2 | 5% |
| Other | 3 | 7% |
| Unknown | 6 | 14% |
Attention Score in Context
This research output has an Altmetric Attention Score of 2. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 25 July 2015.
All research outputs
#14,792,181
of 22,774,233 outputs
Outputs from Scientific Reports
#72,001
of 122,911 outputs
Outputs of similar age
#144,276
of 262,132 outputs
Outputs of similar age from Scientific Reports
#1,133
of 2,016 outputs
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