9 citations · 18 across the 23 of their papers we have counts for
26 papers
Activity-Induced Structural and Dynamical Heterogeneity in Colloidal Gels
Santu Nath, Sudipta Mandal, Smarajit Karmakar
Active gels are intrinsically non-equilibrium materials whose structural and dynamical heterogeneity emerges from the interplay of attractive interactions, thermal fluctuations, an…
Enhanced Long-Wavelength Fluctuations and Interaction-Stress Correlations in Active Crystals
Antik Bhattacharya, Smarajit Karmakar
Activity can enhance the long-wavelength density fluctuations of a solid beyond the equilibrium fluctuations predicted by the Mermin-Wagner-Hohenberg theorem, but the microscopic o…
The Universal Role of Fragility on the Yielding Transition of Active Glass under Oscillatory Shear
Arnab Mandal, Roni Chatterjee, Smarajit Karmakar
The yielding transition marks the onset of irreversible plastic deformation in amorphous solids and plays a central role in determining the mechanical stability and failure of meta…
Active Brownian Dynamics from a Hamiltonian Model: Transitioning from Equilibrium to Activity
Antik Bhattacharya, Smarajit Karmakar, Jürgen Horbach
We introduce a Hamiltonian Active Brownian Particle (HABP) model that connects equilibrium dynamics with the non-equilibrium, two-dimensional overdamped behavior of standard Active…
Study of flow of crystals and deformable particles in a channel and the effective segregation of soft and hard particles
Padmanabha Bose, Smarajit Karmakar
Soft matters whose constituents are deformable are ubiquitous in nature especially in biological systems-including cells and their organelles-as well as in foams and emulsions. The…
Anomalous Dynamical Heterogeneity in Active Glasses as a Signature of Violation of Mermin-Wagner-Hohenberg Theorem
Subhodeep Dey, Smarajit Karmakar
Two-dimensional (2D) systems have attracted renewed interest within the scientific community due to their anomalous dynamical behaviors, which arise from long-wavelength density fl…
Inverse Bauschinger to Bauschinger Crossover under Steady Shear in Amorphous Solids
Rashmi Priya, Smarajit Karmakar
Directional memory in amorphous solids is commonly quantified through the Bauschinger effect, yet the observation of the inverse Bauschinger effect suggests that the sign of memory…
Growth of Dynamic and Static Correlations in the Aging Dynamics of a Glass-Forming Liquid
Santu Nath, Smarajit Karmakar
Using extensive molecular dynamics simulations, we have performed finite-size scaling (FSS) in the aging regime of a model glass-forming liquid to investigate how the length scales…
Understanding the Role of Particle Deformability on the Crystal and Glass formation using Two-dimensional Ring Polymer Model
Padmanabha Bose, Smarajit Karmakar
Soft matter systems are common in nature and make up nearly all the essential components necessary for life, from cells to the organelles within those cells. The ability of these s…
Escape-Induced Temporally Correlated Noise Driven Universality Crossover
Mrinal Manna, Sourav Mukherjee, Soumen Giri +11
Universal behavior in far-from-equilibrium systems is driven by interactions between transport processes and noise structure. The Kardar-Parisi-Zhang (KPZ) framework predicts that…
Active Particle Doping Suppresses Brittle Failure in Ultrastable Glasses
Rashmi Priya, Jürgen Horbach, Smarajit Karmakar
Ultrastable glasses are known for their exceptional mechanical stability but often fail in a brittle manner, typically marked by the formation of shear bands when subjected to shea…
Cascade at local yield strain for silica and metallic glass
Nandlal Pingua, Himani Rautela, Roni Chatterjee +3
We report observations of unusal \emph{first} plastic events in silica and metallic glasses in the shear startup regime at applied strain two orders of magnitude smaller than yield…
Inverse Bauschinger Effect in Active Ultrastable Glasses
Rashmi Priya, Smarajit Karmakar
Memory effects in amorphous materials have been widely studied because of their possible widespread future applications. We show here that ultrastable glasses can exhibit a transie…
Finite Disorder Critical Point in the Brittle-to-Ductile Transition of Amorphous Solids in the Presence of Particle Pinning
Anoop Mutneja, Bhanu Prasad Bhowmik, Smarajit Karmakar
The mechanical yielding of amorphous solids under external loading can be broadly classified into ductile and brittle types, depending on whether their macroscopic stress response…
Scaling Description of the Relaxation Dynamics and Dynamical Heterogeneity of an Active Glass-forming Liquid
Subhodeep Dey, Smarajit Karmakar
Active glasses refer to a class of driven non-equilibrium systems that share remarkably similar dynamical behavior as conventional glass-formers in equilibrium. Glass-like dynamica…
Instabilities govern the low-frequency vibrational spectrum of amorphous solids
Surajit Chakraborty, Roshan Maharana, Smarajit Karmakar +1
Amorphous solids exhibit an excess of low-frequency vibrational modes beyond the Debye prediction, contributing to their anomalous mechanical and thermal properties. Although a $ω^…
Effect of Random Pinning on the Yielding Transition of Amorphous Solid under Oscillatory Shear
Roni Chatterjee, Monoj Adhikari, Smarajit Karmakar
We investigate the effects of random pinning, where we freeze the relaxation degrees of freedom for a fraction of randomly selected particles, on the yielding transition under osci…
Thermostatting of Active Hamiltonian Systems via Symplectic Algorithms
Antik Bhattacharya, Jürgen Horbach, Smarajit Karmakar
We consider a class of non-standard, two-dimensional (2D) Hamiltonian models that may show features of active particle dynamics, and therefore, we refer to these models as active H…
A perspective on active glassy dynamics in biological systems
Souvik Sadhukhan, Subhodeep Dey, Smarajit Karmakar +1
Dynamics is central to living systems. In the last two decades, experiments have revealed that the dynamics in diverse biological systems - from intracellular cytoplasm to cellular…
Role of Fragility of the Glass Formers in the Yielding Transition under Oscillatory Shear
Roni Chatterjee, Monoj Adhikari, Smarajit Karmakar
Amorphous materials, especially metallic glasses, are known for their exceptional mechanical properties, such as high yield strength and large yield strain. Understanding the micro…
Enhanced Long Wavelength Mermin-Wagner Fluctuations in Active Crystals and Glasses
Subhodeep Dey, Antik Bhattacharya, Smarajit Karmakar
In two-dimensions (2D), the Mermin-Wagner-Hohenberg (MWH) fluctuation plays a significant role, giving rise to striking dimensionality effects marked by long-range density fluctuat…
Influence of particle size polydispersity on dynamical heterogeneities in dense particle packings
Rajkumar Biswas, Anoop Mutneja, Smarajit Karmakar +1
The dynamics of dense particle packings near the jamming transition is characterized by correlated particle motion. The growth of dynamical heterogeneities, or strong spatial varia…
Encoding Robust and Fast Memories in Bulk and Nanoscale Amorphous Solids
Monoj Adhikari, Rishabh Sharma, Smarajit Karmakar
We investigate the memory effects under oscillatory shear deformation of amorphous solids through computer simulations. Applications of shear deformations in all orthogonal directi…
Quantum fluctuations lead to glassy electron dynamics in the good metal regime of electron doped KTaO3
Shashank Kumar Ojha, Sankalpa Hazra, Surajit Bera +10
One of the central challenges in condensed matter physics is to comprehend systems that have strong disorder and strong interactions. In the strongly localized regime, their subtle…