A5043477386- Physics of Superconductivity and Magnetism
- Theoretical and Computational Physics
- Organic and Molecular Conductors Research
- Superconducting Materials and Applications
- Particle physics theoretical and experimental studies
- Advanced Condensed Matter Physics
- Superconductivity in MgB2 and Alloys
- Granular flow and fluidized beds
- Magnetic properties of thin films
- High-Energy Particle Collisions Research
- COVID-19 epidemiological studies
- Quantum and electron transport phenomena
- Pickering emulsions and particle stabilization
- Quantum Chromodynamics and Particle Interactions
- Material Dynamics and Properties
- Solid-state spectroscopy and crystallography
- Data-Driven Disease Surveillance
- Cryptographic Implementations and Security
- Iron-based superconductors research
- Magnetism in coordination complexes
- Viral Infections and Outbreaks Research
- High-pressure geophysics and materials
- Security and Verification in Computing
- Radio Astronomy Observations and Technology
- Information and Cyber Security
Tata Institute of Fundamental Research
1998-2022
Henkel (Germany)
2020
Institute of Mathematical Sciences
2012-2016
Princeton University
1996-2000
We study $I\ensuremath{-}V$ characteristics of periodic square Nb wire networks as a function temperature in transverse magnetic field, with focus on three fillings 2/5, 1/2, and 0.618 that represent very different levels incommensurability. For all fillings, scaling behavior is found, suggesting finite continuous superconducting phase transition. The low-temperature are found to have an exponential form, indicative the domain-wall excitations.
Dynamics of a ``quasi-two-dimensional'' flux-line lattice in the layered superconductor 2H-${\mathrm{NbSe}}_{2}$ for field normal to layers is investigated at high fields. Comparisons with numerical simulations imply presence plastic flow soft lattices. Dimensionality effects are more pronounced disorder-dominated regime, where power-law scaling form I-V curve yields conductivity exponent above percolation threshold.
Abstract Current epidemiological models can in principle model the temporal evolution of a pandemic. However, any such will rely on parameters that are unknown, which practice estimated using stochastic and poorly measured quantities. As result, an early prediction long-term pandemic quickly lose relevance, while late be too to useful for disaster management. Unless is designed adaptive, it bound either relevance over time, or trust thus not have second-chance retraining. We propose strategy...
A quantitative COVID-19 model that incorporates hidden asymptomatic patients is developed, and an analytic solution in parametric form given. The the impact of lock-down resulting spatial migration population due to announcement lock-down. method presented for estimating parameters from real-world data, it shown various phases observed epidemiological data are captured well. It increase infections slows down herd immunity achieved when active symptomatic 10-25% four countries we studied....
Current epidemiological models can in principle model the temporal evolution of a pandemic. However, any such will rely on parameters that are unknown, which practice estimated using stochastic and poorly measured quantities. As result, an early prediction long-term pandemic quickly lose relevance, while late be too to useful for disaster management. Unless is designed adaptive, it bound either relevance over time, or trust thus not have second chance retraining. We propose strategy...
Superconducting phase transitions are investigated in an aluminum kagom\'e wire network at different values of uniform frustration with special emphasis on half-filling. While the mean-field diagram shows no cusp half-filling signifying a frustrated ground state, thermal fluctuations appear to restore ordered as seen appearance boundaries. Detailed I-$V$ characteristics indicate unique transition half-filling, distinct from that observed irrational or other rational fillings.
The peak effect (PE) has been observed in a twinned crystal of ${\mathrm{YBa}}_{2}{\mathrm{Cu}}_{3}{\mathrm{O}}_{7\ensuremath{-}\ensuremath{\delta}}$ for $H\ensuremath{\Vert}c$ the low-field range, close to zero-field superconducting transition temperature $[{T}_{c}(0)].$ A sharp depinning succeeds ${T}_{p}$ PE. PE phenomenon broadens and its internal structure smoothens out as field is increased or decreased beyond interval between 250 1000 Oe. Moreover, could not be above 10 kOe below 20...
Cosmetic emollients are widely used in skincare formulations due to their ability 'soften' the skin and modulate formulation spreadability. Though commonly used, little is known about effects on biomechanical barrier properties of human stratum corneum (SC), which play a critical role consumer perception efficacy. Accordingly, our objective was provide new insights with study involving fourteen cosmetic emollient molecules varying structures, molecular weights, SC diffusivities, topological...
We report on the spreading of triboelectrically charged glass particles an oppositely surface a plastic cylindrical container in presence constant mechanical agitation. The spread via sticking, as monolayer cylinder's surface. Continued agitation initiates sequence instabilities this monolayer, which first forms periodic wavy-stripe-shaped transverse density modulation and then ejects narrow long particle-jets from tips these stripes. These jets finally coalesce laterally to form homogeneous...
In this paper, we study the Fowler-Nordheim field emission (FNFE) from carbon nanotubes on basis of a newly formulated electron dispersion law by considering fact that intense electric needed for FNFE changes band structure in fundamental way. It has been found emitted current increases with increasing oscillatory manner due to appearance van Hove singularities and exhibits spikes particular values where singularity occurs. The numerical all cases vary widely determined chiral indices...
We show that the order-disorder phase transition in three-state Potts ferromagnet on a square lattice is driven by coupled proliferation of domain walls and vortices. Raising vortex core energy above threshold value decouples splits into two. The between two transitions exhibits an emergent U(1) symmetry quasi-long-range order. Lowering below also but system forms intermediate phase.
Magic sand, a hydrophobic toy granular material, is widely used in popular science instructions because of its nonintuitive mechanical properties. A detailed study the failure an underwater column magic sand shows that these properties can be traced to single phenomenon: system self-generates cohesive skin encapsulates material inside. The skin, consisting pinned air-water-grain interfaces, multiscale properties: they range from contact-line dynamics intragrain roughness scale, plastic flow...
The nearest neighbor dependence of the pressure induced polymorphic phase transitions mercury chalcogenides have been analyzed. An ionic and a metallic model were used to compute lattice energies both low high phases transition pressures HgSe x Te 1−x alloys. It was found that, contrary alkali halides, increases experimentally as well indicated by theoretical calculations with increasing distance. This is interpreted different behavior distances related transitions. In case although...
The following errors have been detected.In the left column of p. 2992, on line 8 and 18, word "continuous" was incorrectly changed to "continuously."On 4 second last paragraph same page (p.2992), term "I-V curves" "10 curves.
We show that collective chaotic behavior emerging from the Boltzmann picture of gases provides an alternate conceptual framework to analyze and create apparent randomness on computers. For instance, at equilibrium distribution various physical quantities such as position or velocities two-dimensional projection kinetic energy can be used generate uniform, Gaussian, exponential distributions. Finally, based these ideas we present a simplified but highly efficient mesoscopic Boltzmann-type...
We show that suppression of vortices in the Ashkin Teller ferromagnet on a square lattice splits order-disorder transition and opens up an intermediate phase where macroscopic symmetry enhances to U(1). When we selectively suppress formation non-chiral vortices, chiral proliferate replace U(1) with new is restored. This result demonstrates fascinating phenomenon which information encoded topological defects manifests itself proliferate. also this can occur all $\mathbb{Z}_n$ ferromagnets...