80 citations · 1.1k across the 77 of their papers we have counts for
42 papers · 1 filter
Ordering Dynamics of the Random Field Long-range Ising Model in One Dimension
Ramgopal Agrawal, Federico Corberi, Eugenio Lippiello +1
We investigate the influence of long-range (LR) interactions on the phase ordering dynamics of the one-dimensional random field Ising model (RFIM). Unlike the usual RFIM, a spin in…
Strain Fields and Critical Phenomena in Manganites II: Spin-Lattice-Energy Hamiltonians
Rohit Singh, Sanjay Puri
The dynamic critical behavior at the paramagnetic-antiferromagnetic (PM-AFM) transition in manganites has recently been studied experimentally [Niermann et al., Phys. Rev. Lett. {\…
Strain Fields and Critical Phenomena in Manganites I: Spin-Lattice Hamiltonians
Rohit Singh, Sanjay Puri
We use a model Hamiltonian to study critical phenomena in manganites. This Hamiltonian includes long-range strain interactions, and a coupling between the magnetic order parameter…
Critical behavior of the three-state random-field Potts model in three dimensions
Manoj Kumar, Varsha Banerjee, Sanjay Puri +1
Enormous advances have been made in the past 20 years in our understanding of the random-field Ising model, and there is now consensus on many aspects of its behavior at least in t…
Equilibrium phases and domain growth kinetics of calamitic liquid crystals
Nishant Birdi, Tom L. Underwood, Nigel B. Wilding +2
The anisotropic shape of calamitic LC particles results in distinct energy values when nematogens are placed side-by-side or end-to-end. The energy anisotropy governed by parameter…
Asymptotic States of Ising Ferromagnets with Long-range Interactions
Ramgopal Agrawal, Federico Corberi, Ferdinando Insalata +1
It is known that, after a quench to zero temperature (), two-dimensional () Ising ferromagnets with short-range interactions do not always relax to the ordered state. The…
Domain Growth and Aging in the Random Field XY Model: A Monte Carlo Study
Ramgopal Agrawal, Manoj Kumar, Sanjay Puri
We use large-scale Monte Carlo simulations to obtain comprehensive results for domain growth and aging in the random field XY model in dimensions . After a deep quench from…
Dipolar Ising Model: Phases, Growth Laws and Universality
Shikha Kumari, Sanjay Puri, Varsha Banerjee
The behavior of many magnetic and dielectric solids, and the more contemporary magnetic super-lattices, is governed by dipolar interactions. They are anisotropic and long-ranged, h…
Kinetics of the Two-dimensional Long-range Ising Model at Low Temperatures
Ramgopal Agrawal, Federico Corberi, Eugenio Lippiello +2
We study the low-temperature domain growth kinetics of the two-dimensional Ising model with long-range coupling: , where is the dimensionality. Accordin…
Domain Growth in Ferronematics: Slaved Coarsening, Emergent Morphologies and Growth Laws
Aditya Vats, Varsha Banerjee, Sanjay Puri
Ferronematics (FNs) are suspensions of magnetic nanoparticles in nematic liquid crystals (NLCs). They have attracted much experimental attention, and are of great interest both sci…
Surface-directed Spinodal Decomposition on Morphologically Patterned Substrates
Prasenjit Das, Prabhat K. Jaiswal, Sanjay Puri
This paper is the second in a two-part exposition on {\it surface-directed spinodal decomposition} (SDSD), i.e., the interplay of kinetics of wetting and phase separation at a surf…
Growth Kinetics and Aging Phenomena in a Frustrated System
Manoj Kumar, Federico Corberi, Eugenio Lippiello +1
We study numerically the ordering kinetics in a two-dimensional Ising model with random coupling where the fraction of antiferromagnetic links can be gradually tuned. We show t…
Ordering kinetics in q-state random-bond clock model: Role of Vortices and Interfaces
Swarnajit Chatterjee, Sabyasachi Sutradhar, Sanjay Puri +1
In this article, we present a Monte Carlo study of phase transition and coarsening dynamics in the non-conserved two-dimensional random-bond -state clock model (RBCM) deriving f…
Slaved Coarsening in Ferronematics
Aditya Vats, Varsha Banerjee, Sanjay Puri
We focus on understanding the influence of the two-component coupling in ferronematics, a colloidal suspension of magnetic nanoparticles in nematic liquid crystals. Using coarse-gr…
Quantum Chaotic Systems and Random Matrix Theory
Akhilesh Pandey, Avanish Kumar, Sanjay Puri
This article is an introductory review of random matrix theory (RMT) and its applications, with special focus on quantum chaos. Random matrices were first used by Wigner to underst…
Finite-Range Coulomb Gas Models II: Applications to Quantum Kicked Rotors and Banded Random Matrices
Avanish Kumar, Akhilesh Pandey, Sanjay Puri
In paper I of this two-stage exposition, we introduced finite-range Coulomb gas (FRCG) models, and developed an integral-equation framework for their study. We obtained exact analy…
Finite-Range Coulomb Gas Models I: Some Analytical Results
Akhilesh Pandey, Avanish Kumar, Sanjay Puri
Dyson has shown an equivalence between infinite-range Coulomb gas models and classical random matrix ensembles for the study of eigenvalue statistics. In this paper, we introduce f…
Effects of Frustration on Fluctuation-dissipation Relations
Federico Corberi, Manoj Kumar, Eugenio Lippiello +1
We study numerically the aging properties of the two-dimensional Ising model with quenched disorder considered in our recent paper [Phys. Rev. E 95, 062136 (2017)], where frustrati…
Ordering kinetics in q-state clock model: scaling properties and growth laws
Swarnajit Chatterjee, Sanjay Puri, Raja Paul
We present a comprehensive Monte Carlo study of the ordering kinetics in the ferromagnetic -state clock model with nonconserved Glauber dynamics. In agreement with previou…
Kinetic Spinodal Instabilities in the Mott Transition in V2O3: Evidence from Hysteresis Scaling and Dissipative Phase Ordering
Tapas Bar, Sujeet Kumar Choudhary, Md. Arsalan Ashraf +4
We present the first systematic observation of scaling of thermal hysteresis with the temperature scanning rate around an abrupt thermodynamic transition in correlated electron sys…
Universality of Domain Growth in Antiferromagnets with Spin-Exchange Kinetics
Prasenjit Das, Tanusri Saha-Dasgupta, Sanjay Puri
We study phase ordering kinetics in symmetric and asymmetric binary mixtures, undergoing an order-disorder transition below the critical temperature. Microscopically, we model the…
Ordering Kinetics in the Random Bond XY Model
Manoj Kumar, Swarnajit Chatterjee, Raja Paul +1
We present a comprehensive Monte Carlo study of domain growth in the random-bond XY model with non-conserved kinetics. The presence of quenched disorder slows down domain growth in…
Granular Fluids with Solid Friction and Heating
Prasenjit Das, Sanjay Puri, Moshe Schwartz
We perform large-scale molecular dynamics simulations to study heated granular fluids in three dimensions. Granular particles dissipate their kinetic energy due to solid frictional…
Finite-Range Coulomb Gas Models of Banded Random Matrices and Quantum Kicked Rotors
Akhilesh Pandey, Avanish Kumar, Sanjay Puri
Dyson demonstrated an equivalence between infinite-range Coulomb gas models and classical random matrix ensembles for study of eigenvalue statistics. We introduce finite-range Coul…