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Title: Length scales in glass-forming liquids and related systems: a review
Authors: Karmakar, Smarajit
Dasgupta, Chandan
Sastry, Srikanth
Keywords: Physics
glass forming liquids
structrual relaxation
length scales
glass transition
amorphous solids
Spatially Heterogeneous Dynamics
Bond-Orientational Order
Growing Amorphous Order
Jones Binary-Mixture
Mode-Coupling Theory
Mean-Field Potts
Supercooled Liquids
Structural Glasses
Activated Dynamics
Colloidal Glasses
Issue Date: 2016
Publisher: IoP Publishing Ltd
Citation: Karmakar, S.; Dasgupta, C.; Sastry, S., Length scales in glass-forming liquids and related systems: a review. Reports on Progress in Physics 2016, 79 (1), 36
Reports on Progress In Physics
Abstract: The central problem in the study of glass-forming liquids and other glassy systems is the understanding of the complex structural relaxation and rapid growth of relaxation times seen on approaching the glass transition. A central conceptual question is whether one can identify one or more growing length scale(s) associated with this behavior. Given the diversity of molecular glass-formers and a vast body of experimental, computational and theoretical work addressing glassy behavior, a number of ideas and observations pertaining to growing length scales have been presented over the past few decades, but there is as yet no consensus view on this question. In this review, we will summarize the salient results and the state of our understanding of length scales associated with dynamical slow down. After a review of slow dynamics and the glass transition, pertinent theories of the glass transition will be summarized and a survey of ideas relating to length scales in glassy systems will be presented. A number of studies have focused on the emergence of preferred packing arrangements and discussed their role in glassy dynamics. More recently, a central object of attention has been the study of spatially correlated, heterogeneous dynamics and the associated length scale, studied in computer simulations and theoretical analysis such as inhomogeneous mode coupling theory. A number of static length scales have been proposed and studied recently, such as the mosaic length scale discussed in the random first-order transition theory and the related point-to-set correlation length. We will discuss these, elaborating on key results, along with a critical appraisal of the state of the art. Finally we will discuss length scales in driven soft matter, granular fluids and amorphous solids, and give a brief description of length scales in aging systems. Possible relations of these length scales with those in glass-forming liquids will be discussed.
Description: Restricted Access
ISSN: 0034-4885
Appears in Collections:Research Articles (Srikanth Sastry)

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