Debashree Chowdhury
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View article: Magnetizing weak links by time-dependent spin-orbit interactions: momentum conserving and non-conserving processes
Magnetizing weak links by time-dependent spin-orbit interactions: momentum conserving and non-conserving processes Open
Rashba spin-orbit interactions generated by time-dependent electric fields acting on weak links (that couple together non-magnetic macroscopic leads) can magnetize the junction. The Rashba spin-orbit interaction that affects the spins of e…
View article: Thermoelectric performance of nanojunctions subjected to microwave-driven spin-orbit coupling
Thermoelectric performance of nanojunctions subjected to microwave-driven spin-orbit coupling Open
Coherent charge and heat transport through periodically driven nanodevices\nprovide a platform for studying thermoelectric effects on the nanoscale. Here\nwe study a junction comprising a quantum dot connected to two fermionic\nterminals b…
View article: Transport properties of a non-Hermitian Weyl semimetal
Transport properties of a non-Hermitian Weyl semimetal Open
In recent years, non-Hermitian (NH) topological semimetals have garnered significant attention due to their unconventional properties. In this work, we explore the transport properties of a three-dimensional dissipative Weyl semi-metal for…
View article: Hexagonally warped exceptional physics in multi-Weyl semimetals
Hexagonally warped exceptional physics in multi-Weyl semimetals Open
Hexagonal warping (HW) in three-dimensional topological insulators is, by now, well-known. We show that non-Hermitian (NH) loss/gain can generate an exceptional HW effect in double Weyl-semimetals (DWSM). This unique feature of DWSMs has d…
View article: Light-driven Lifshitz transitions in non-Hermitian multi-Weyl semimetals
Light-driven Lifshitz transitions in non-Hermitian multi-Weyl semimetals Open
Non-Hermitian topological systems are the newest additions to the growing field of topological matter. In this work, we report the light-driven exceptional physics in a multi-Weyl semimetal. The driving is not only a key ingredient to cont…
View article: Temporal evolution of fluxes in driven quantum dots
Temporal evolution of fluxes in driven quantum dots Open
View article: Photoinduced tunable anomalous Hall and Nernst effects in tilted Weyl semimetals using Floquet theory
Photoinduced tunable anomalous Hall and Nernst effects in tilted Weyl semimetals using Floquet theory Open
In this paper, we discuss the effect of a periodically driving circularly\npolarized laser beam in the high frequency limit, on the band structure and\nthermal transport properties of type-I and type-II Weyl semimetals (WSMs). We\ndevelop …
View article: Anomalous thermoelectric properties of a Floquet topological insulator with spin momentum non-orthogonality
Anomalous thermoelectric properties of a Floquet topological insulator with spin momentum non-orthogonality Open
The spin momentum non-orthogonality in 3D topological insulators leads to modification of the spin texture and brings in an out-of-plane spin polarization component. Apart from the spin texture, the anomalous thermoelectric properties of t…
View article: Thermoelectric transport of a Floquet topological insulator with Spin momentum non-orthogonality
Thermoelectric transport of a Floquet topological insulator with Spin momentum non-orthogonality Open
View article: Quantum Capacitance of a Topological Insulator-Ferromagnet Interface
Quantum Capacitance of a Topological Insulator-Ferromagnet Interface Open
View article: Geometric phase and fractional orbital-angular-momentum states in electron vortex beams
Geometric phase and fractional orbital-angular-momentum states in electron vortex beams Open
We study here fractional orbital angular momentum (OAM) states in electron\nvortex beams (EVB) from the perspective of geometric phase. We have considered\nthe skyrmionic model of an electron, where it is depicted as a scalar electron\norb…
View article: Anisotropic Fermi surface and in-plane magnetization effects on Quantum capacitance for FM/TI interface
Anisotropic Fermi surface and in-plane magnetization effects on Quantum capacitance for FM/TI interface Open
Topological insulators(TI) are a unique class of materials with exotic surface electronic properties. When a ferromagnetic (FM) layer is added on the top of a thin film 3D TI, the surface states gain magnetization. We point out here that t…
View article: Consequences of the thermal dependence of spin orbit coupling in semiconductors
Consequences of the thermal dependence of spin orbit coupling in semiconductors Open
View article: Spin accumulation in asymmetric topological insulator thin films in out of plane magnetic fields
Spin accumulation in asymmetric topological insulator thin films in out of plane magnetic fields Open
In this work we study the spin accumulation due to an in-plane electric field in an asymmetric topological insulator (TI) thin film system with an out of plane magnetic field and an in-plane magnetization. A TI thin film differs from the m…
View article: Unified Approach towards the Dynamics of Optical and Electron Vortex Beams
Unified Approach towards the Dynamics of Optical and Electron Vortex Beams Open
We have proposed a unified framework towards the dynamics of optical and electron vortex beams from the perspective of the geometric phase and the associated Hall effects. The unification is attributed to the notion that the spin degrees o…
View article: Effect of perturbative hexagonal warping on quantum capacitance in ultra-thin topological insulators
Effect of perturbative hexagonal warping on quantum capacitance in ultra-thin topological insulators Open
Ultra-thin 3D topological insulators provide a stage to study the surface physics of such materials by minimizing the bulk contribution. Further, the experimentally verified snowflake like structure of the Fermi surface leads to a hexagona…
View article: Relativistic Electron Vortex Beams in a Laser Field
Relativistic Electron Vortex Beams in a Laser Field Open
The orbital angular momentum Hall effect and the spin Hall effect of electron vortex beams (EVBs) have been studied for the EVBs interacting with a laser field. In the scenario of a paraxial beam, the cumulative effect of the orbit-orbit i…
View article: Kane model parameters and stochastic spin current
Kane model parameters and stochastic spin current Open
View article: Perturbative Hexagonal Warping in Ultra-Thin Topological Insulators
Perturbative Hexagonal Warping in Ultra-Thin Topological Insulators Open
Ultra-thin 3D topological insulators provide a stage to study the surface physics of such materials by minimizing the bulk contribution. Further, the experimentally verified snowflake like structure of the Fermi surface leads to a hexagona…
View article: Electron vortex beams in a magnetic field and spin filter
Electron vortex beams in a magnetic field and spin filter Open
We investigate the propagation of electron vortex beams in a magnetic field.\nIt is pointed out that when electron vortex beams carrying orbital angular\nmomentum propagate in a magnetic field, the Berry curvature associated with the\nscal…
View article: Effect of non-uniform exchange field in ferromagnetic graphene
Effect of non-uniform exchange field in ferromagnetic graphene Open