A5002121999- Graphene research and applications
- Topological Materials and Phenomena
- Quantum and electron transport phenomena
- Metamaterials and Metasurfaces Applications
- Diamond and Carbon-based Materials Research
- Photonic and Optical Devices
- Atomic and Subatomic Physics Research
- Antenna Design and Analysis
- Quantum many-body systems
- Antenna Design and Optimization
- Microwave Engineering and Waveguides
- Quantum, superfluid, helium dynamics
- Advanced Antenna and Metasurface Technologies
- Millimeter-Wave Propagation and Modeling
- Plasmonic and Surface Plasmon Research
- Carbon Nanotubes in Composites
GLA University
2021-2025
University of Allahabad
2024
University of Delhi
2016
Indian Institute of Technology Delhi
2012-2014
In this review article we discuss the recent progress in studying ballistic transport for charge carriers graphene through highly inhomogenous magnetic field known as barrier combination with gate voltage induced electrostatic potential. Starting cases a single or double also understanding electron superlattices created out of such electromagnetic potential barriers and possibility experimental realization systems. The emphasis is particularly on analogy propagation light wave medium...
A novel strategy for the synthesis of highly ordered low-aspect ratio carbon nanocup arrays and its field emission properties.
Massless Dirac fermions in monolayer graphene exhibit total transmission when normally incident on a scalar potential barrier, consequence of the Klein paradox originally predicted by O for relativistic electrons obeying 3 + 1 dimensional equation. For bilayer graphene, charge carriers are massive and, due to different chiralities, electron and hole states not coupled each other. Therefore, wavefunction an particle decays inside barrier as non-relativistic Schrödinger This leads...
In the absence of a magnetic field, scattered wavefunction inside circular p-n junction in graphene exhibits an interference pattern with high intensity maximum located around caustics. We investigate wavefunctions presence uniform field outside region to show how loci changes by forming Landau level structure and central due strong reflection massless Dirac fermions field. conclude suggesting experimental ways detect such change effect
Abstract The irradiation of topological insulator surface with elliptically polarized light modifies the properties in a phase-dependent manner impacting Floquet Chern number which is crucial invariant associated such driven systems. Employing theory presence hexagonal warping term Dirac fermion Hamiltonian under off-resonant conditions, we derive an effective that highlights distinct features Floquet-Dirac states. Specifically, identify helicity and ellipticity-dependent mass quasi-static...
In the world of wireless communication, antennas are essential components. Antennas act as a link between electrical devices and intangible waves that transmit data over various communication systems. Meandered line have several benefits, including proven impedance matching, multiband operation, compact size. For millimeter-wave 5G Multiple-Input Multiple-Output (MIMO) antenna with Meander lines sharing radiator is described. The single element radiator’s unique design offers required...
Abstract The surface states of topological insulators are characterized by spin-momentum locking, where the electron spin is locked perpendicular to its momentum. This property preserved under gate potentials which can be used manipulate currents without an external magnetic field enhancing prospects for spintronic applications. Here, we investigate scattering wave functions within circular n-p junction positioned on upper quintuple-layered three-dimensional insulator. With analytical...