90 citations · 190 across the 12 of their papers we have counts for
12 papers
Mode-selective excitation in parametrically driven coupled quantum oscillators
Ranjani Seshadri
A parametrically driven classical harmonic oscillator exhibits resonant instability when driven at twice its natural frequency, with the lowest energy configuration remaining unaff…
Response of the Quantum Ground State to a Parametric Drive
Ranjani Seshadri
The phenomenon of Parametric Resonance (PR) is very well studied in classical systems with one of the textbook examples being the stabilization of a Kapitza's pendulum in the inver…
Josephson Junction of Nodal Superconductors with Rashba and Ising Spin-Orbit coupling
Gal Cohen, Ranjani Seshadri, Maxim Khodas +1
We study the effect of a Rashba spin-orbit coupling on the nodal superconducting phase of an Ising superconductor. Such nodal phase was predicted to occur when applying an in-plane…
Optical conductivity of a topological system driven using a realistic pulse
Ranjani Seshadri, T. Pereg-Barnea
The effect of a time-periodic perturbation, such as radiation, on a system otherwise at equilibrium has been studied in the context of Floquet theory with stationary states replace…
Floquet topological phases on a honeycomb lattice using elliptically polarized light
Ranjani Seshadri
We study the effect of driving a two-dimensional honeycomb system out of equilibrium using an elliptically polarized light as a time-dependent perturbation. In particular, we try t…
Engineering Floquet topological phases using elliptically polarized light
Ranjani Seshadri, Diptiman Sen
We study a two-dimensional topological system driven out of equilibrium by the application of elliptically polarized light. In particular, we analyze the Bernevig-Hughes-Zhang mode…
Josephson junctions of topological nodal superconductors
Ranjani Seshadri, Maxim Khodas, Dganit Meidan
Transition metal dichalcogenides (TMDs) offer a unique platform to study unconventional superconductivity, owing to the presence of strong spin-orbit coupling and a remarkable stab…
Generating a second-order topological insulator with multiple corner states by periodic driving
Ranjani Seshadri, Anirban Dutta, Diptiman Sen
We study the effects of periodic driving on a variant of the Bernevig-Hughes-Zhang (BHZ) model defined on a square lattice. In the absence of driving, the model has both topologica…
Topological magnons in a kagome lattice spin system with and Dzyaloshinskii-Moriya interactions
Ranjani Seshadri, Diptiman Sen
We study the phases of a spin system on the Kagome lattice with nearest-neighbor interactions with anisotropy ratio and Dzyaloshinsky-Moriya interactions with strength $D…
Electron dynamics in graphene with spin-orbit couplings and periodic potentials
Ranjani Seshadri, Diptiman Sen
We use both continuum and lattice models to study the energy-momentum dispersion and the dynamics of a wave packet for an electron moving in graphene in the presence of spin-orbit…
Edge states, spin transport and impurity induced local density of states in spin-orbit coupled graphene
Ranjani Seshadri, K. Sengupta, Diptiman Sen
We study graphene which has both spin-orbit coupling (SOC), taken to be of the Kane-Mele form, and a Zeeman field induced due to proximity to a ferromagnetic material. We show that…
Confining electrons on a topological insulator surface using potentials and a magnetic field
Ranjani Seshadri, Diptiman Sen
We study the effects of extended and localized potentials and a magnetic field on the Dirac electrons residing at the surface of a three-dimensional topological insulator. We use a…