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- Tamoghna Das, Surajit Sengupta, Madan Rao
- Physical review. E, Statistical, nonlinear, and…
- 2010

We show, using molecular-dynamics simulations, that a two-dimensional Lennard-Jones solid exhibits droplet fluctuations characterized by nonaffine deviations from local crystallinity. The fraction of particles in these droplets increases as the mean density of the solid decreases and approaches ≈20% of the total number in the vicinity of the fluid-solid… (More)

- Tamoghna Das, Saswati Ganguly, Surajit Sengupta, Madan Rao
- Scientific reports
- 2015

A crystalline solid exhibits thermally induced localised non-affine droplets in the absence of external stress. Here we show that upon an imposed shear, the size of these droplets grow until they percolate at a critical strain, well below the value at which the solid begins to yield. This critical point does not manifest in most thermodynamic or mechanical… (More)

- Tamoghna Das, Surajit Sengupta, Subhasis Sinha
- Journal of physics. Condensed matter : an…
- 2009

We study structural transitions in a system of interacting particles arranged as a crystalline bilayer, as a function of the density ρ and the distance d between the layers. As d is decreased a sequence of transitions involving triangular, rhombic, square and centred rectangular lattices is observed. The sequence of phases and the order of transitions… (More)

- Tamoghna Das, Turab Lookman, Mahesh M Bandi
- Soft matter
- 2015

A dimensionless parameter Λ is proposed to describe a hierarchy of morphologies in two-dimensional (2D) aggregates formed due to varying competition between short-range attraction and long-range repulsion. Structural transitions from finite non-compact to compact to percolated structures are observed in the configurations simulated by molecular dynamics at… (More)

- Tamoghna Das, Turab Lookman, Mahesh M Bandi
- Soft matter
- 2016

Particulate aggregates occur in a variety of non-equilibrium steady-state morphologies ranging from finite-size compact crystalline structures to non-compact string-like conformations. This diversity is due to the competition between pair-wise short range attraction and long range repulsion between particles. We identify different microscopic mechanisms in… (More)

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