39 citations · 263 across the 18 of their papers we have counts for
18 papers
Nonlinear Optical Spectroscopy of Nodal-Line Semimetals
Navdeep Rana, M. S. Mrudul, Amar Bharti +2
Intense laser-driven nonlinear optical phenomena in two-dimensional (2D) nodal-line semimetals (NLS) exhibit complex mechanisms, particularly in the NbSiTe material sys…
Instabilities and turbulence in extensile swimmer suspensions
Purnima Jain, Navdeep Rana, Roberto Benzi +1
We study low Reynolds number turbulence in a suspension of polar, extensile, self-propelled inertial swimmers. We review the bend and splay mechanisms that destabilize an ordered f…
Polarization-Resolved Core Exciton Dynamics in LiF Using Attosecond Transient Absorption Spectroscopy
Kylie J Gannan, Lauren B Drescher, Rafael Quintero-Bermudez +5
The ability to control absorption by modifying the polarization of light presents an exciting opportunity to experimentally determine the orbital alignment of absorption features.…
Optical Control of Ultrafast Photocurrent in Graphene
Navdeep Rana, Gopal Dixit
The ability to manipulate electrons with the intense laser pulse enables an unprecedented control over the electronic motion on its intrinsic timescale. Present work explores the d…
High-Harmonic Generation from Engineered Graphene for Polarization Tailoring
Navdeep Rana, M. S. Mrudul, Gopal Dixit
Strain engineering is a versatile method to boost the carrier mobility of two-dimensional materials-based electronics and optoelectronic devices. In addition, strain is ubiquitous…
Inertia drives concentration-wave turbulence in swimmer suspensions
Purnima Jain, Navdeep Rana, Sriram Ramaswamy +1
We discover an instability mechanism in suspensions of self-propelled particles that does not involve active stress. Instead, it is driven by a subtle interplay of inertia, swimmer…
All-Optical Ultrafast Valley Switching in Two-Dimensional Materials
Navdeep Rana, Gopal Dixit
Electrons in two-dimensional materials possess an additional quantum attribute, the valley pseudospin, labelled as and -- analogous to the spin u…
Generation of Circularly-Polarised High-Harmonics with Identical Helicity in Two-Dimensional Materials
Navdeep Rana, M. S. Mrudul, Gopal Dixit
Generation of circularly-polarized high-harmonics with the same helicity to all orders is indispensable for chiral-sensitive spectroscopy with attosecond temporal resolution. Solid…
Defect Solutions of the Non-reciprocal Cahn-Hilliard Model: Spirals and Targets
Navdeep Rana, Ramin Golestanian
We study the defect solutions of the Non-reciprocal Cahn-Hilliard model (NRCH). We find two kinds of defects, spirals with unit magnitude topological charge, and topologically neut…
Defect turbulence in a dense suspension of polar, active swimmers
Navdeep Rana, Rayan Chatterjee, Sunghan Ro +3
We study the effects of inertia in dense suspensions of polar swimmers. The hydrodynamic velocity field and the polar order parameter field describe the dynamics of the suspension.…
Tailoring polarisation of attosecond pulses via co-rotating bicircular laser fields
Rambabu Rajpoot, Amol R. Holkundkar, Navdeep Rana +1
The present work introduces a robust way to generate attosecond pulses with tunable ellipticity via high-order harmonic generation by co-rotating bicircular laser fields. T…
Probing phonon-driven symmetry alterations in graphene via high-harmonic spectroscopy
Navdeep Rana, Gopal Dixit
High-harmonic spectroscopy has become an essential ingredient in probing various ultrafast electronic processes in solids with sub-cycle temporal resolution. Despite its immense im…
High-Harmonic Spectroscopy of Coherent Lattice Dynamics in Graphene
Navdeep Rana, M. S. Mrudul, Daniil Kartashov +2
High-harmonic spectroscopy of solids is a powerful tool, which provides access to both electronic structure and ultrafast electronic response of solids, from their band structure a…
Phase ordering, topological defects, and turbulence in the 3D incompressible Toner-Tu equation
Navdeep Rana, Prasad Perlekar
We investigate phase ordering dynamics of the incompressible Toner-Tu equation in three dimensions. We show that the phase ordering proceeds via defect merger events and the dynami…
Four-Dimensional Imaging of Lattice Dynamics using Inelastic Scattering
Navdeep Rana, Aditya Prasad Roy, Dipanshu Bansal +1
Time-resolved mapping of lattice dynamics in real- and momentum-space is essential to understand better several ubiquitous phenomena such as heat transport, displacive phase transi…
Coarsening in the two-dimensional incompressible Toner-Tu equation: Signatures of turbulence
Navdeep Rana, Prasad Perlekar
We investigate coarsening dynamics in the two-dimensional, incompressible Toner-Tu equation. We show that coarsening proceeds via vortex merger events, and the dynamics crucially d…
Inertia drives a flocking phase transition in viscous active fluids
Rayan Chatterjee, Navdeep Rana, R. Aditi Simha +2
How fast must an oriented collection of extensile swimmers swim to escape the instability of viscous active suspensions? We show that the answer lies in the dimensionless combinati…
Spreading of non-motile bacteria on a hard agar plate: Comparison between agent-based and stochastic simulations
Navdeep Rana, Pushpita Ghosh, Prasad Perlekar
We study spreading of a non-motile bacteria colony on a hard agar plate by using agent-based and continuum models. We show that the spreading dynamics depends on the initial nutrie…