Does a Growing Static Length Scale Control the Glass Transition?

Several theories of the glass transition propose that the structural relaxation time tau(alpha) is controlled by a growing static length scale. that is determined by the free energy landscape but not by the local dynamic rules governing its exploration. We argue, based on recent simulations using particle-radius-swap dynamics, that only a modest factor in the increase in ta on approach to the glass transition may stem from the growth of a static length, with a vastly larger contribution attributable, instead, to a slowdown of local dynamics. This reinforces arguments that we base on the observed strong coupling of particle diffusion and density fluctuations in real glasses.


Published in:
Physical Review Letters, 119, 19, 195501
Year:
2017
Publisher:
College Pk, American Physical Society
ISSN:
0031-9007
Laboratories:




 Record created 2017-12-04, last modified 2018-09-13


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