Understanding slow and heterogeneous dynamics in model supercooled glass-forming liquids
I Tah, A Mutneja, S Karmakar - ACS omega, 2021 - ACS Publications
Glasses are ubiquitous in nature. Many common items such as ketchups, cosmetic products,
toothpaste, etc. and metallic glasses are examples of such glassy materials whose …
toothpaste, etc. and metallic glasses are examples of such glassy materials whose …
Fragility in glassy liquids: A structural approach based on machine learning
The rapid rise of viscosity or relaxation time upon supercooling is a universal hallmark of
glassy liquids. The temperature dependence of viscosity, however, is quite nonuniversal for …
glassy liquids. The temperature dependence of viscosity, however, is quite nonuniversal for …
Invariance of the relation between α relaxation and β relaxation in metallic glasses to variations of pressure and temperature
Dielectric relaxation experiments performed at ambient and elevated pressures P in
molecular, ionic, and polymeric glass formers have established that the relation of the Johari …
molecular, ionic, and polymeric glass formers have established that the relation of the Johari …
A geometry-enhanced graph neural network for learning the smoothness of glassy dynamics from static structure
Modeling the dynamics of glassy systems has been challenging in physics for several
decades. Recent studies have shown the efficacy of Graph Neural Networks (GNNs) in …
decades. Recent studies have shown the efficacy of Graph Neural Networks (GNNs) in …
Clarifying the nature of the Johari-Goldstein β-relaxation and emphasising its fundamental importance
KL Ngai, S Capaccioli, M Paluch… - Philosophical …, 2020 - Taylor & Francis
Since 1998 the primitive relaxation time τ 0 (T, P) of the Coupling Model (CM) and the Johari-
Goldstein (JG) β-relaxation time τJG (T, P) are shown approximately equal in many glass …
Goldstein (JG) β-relaxation time τJG (T, P) are shown approximately equal in many glass …
Enhanced short time peak in four-point dynamic susceptibility in dense active glass-forming liquids
S Dey, A Mutneja, S Karmakar - Soft Matter, 2022 - pubs.rsc.org
Active glassy systems are simple model systems that imitate complex biological processes.
Sometimes, it becomes crucial to estimate the amount of activity present in such biological …
Sometimes, it becomes crucial to estimate the amount of activity present in such biological …
Kinetic fragility directly correlates with the many-body static amorphous order in glass-forming liquids
I Tah, S Karmakar - Physical Review Materials, 2022 - APS
The term “fragility” describes the rate at which viscosity grows when a supercooled liquid
approaches its putative glass transition temperature. The field of glassy materials is actively …
approaches its putative glass transition temperature. The field of glassy materials is actively …
Microscopic understanding of the Johari-Goldstein relaxation gained from nuclear -resonance time-domain-interferometry experiments
KL Ngai - Physical Review E, 2021 - APS
Traditionally the study of dynamics of glass-forming materials has been focused on the
structural α relaxation. However, in recent years experimental evidence has revealed that a …
structural α relaxation. However, in recent years experimental evidence has revealed that a …
Machine learning that predicts well may not learn the correct physical descriptions of glassy systems
The complexity of glasses makes it challenging to explain their dynamics. Machine learning
(ML) has emerged as a promising pathway for understanding glassy dynamics by linking …
(ML) has emerged as a promising pathway for understanding glassy dynamics by linking …
Dynamical heterogeneity in active glasses is inherently different from its equilibrium behavior
K Paul, A Mutneja, SK Nandi… - Proceedings of the …, 2023 - National Acad Sciences
Activity-driven glassy dynamics, while ubiquitous in collective cell migration, intracellular
transport, dynamics in bacterial and ant colonies, etc., also extends the scope and extent of …
transport, dynamics in bacterial and ant colonies, etc., also extends the scope and extent of …