Determination of onset temperature from the entropy for fragile to strong liquids
| Autor: | Atreyee Banerjee, Sarika Maitra Bhattacharyya, Manoj Kumar Nandi, Srikanth Sastry |
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| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Physics
010304 chemical physics General Physics and Astronomy Thermodynamics FOS: Physical sciences Condensed Matter - Soft Condensed Matter Residual 01 natural sciences Positive entropy Phase space 0103 physical sciences Soft Condensed Matter (cond-mat.soft) Physical and Theoretical Chemistry 010306 general physics Entropy (arrow of time) |
| Popis: | In this paper we establish a connection between the onset temperature of glassy dynamics with the change in the entropy for a wide range of model systems. We identify the crossing temperature of pair and excess entropies as the onset temperature. Below the onset temperature, the residual multiparticle entropy(RMPE), the difference between excess and pair entropies, becomes positive. The positive entropy can be viewed as equivalent to the larger phase space exploration of the system. The new method of onset temperature prediction from entropy is less ambiguous, as it does not depend on any fitting parameter like the existing methods. Our study also reveals the connection between fragility and the degree of breakdown of the Stokes Einstein (SE) relation. 8 pages, 4 figures |
| Databáze: | OpenAIRE |
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