6 papers
Quantum oscillation spectroscopy of Fermi-surface topologies in tetralayer graphene
Abhijit Halder, Harsh Varshney, Snehamoyee Hazra +7
Quantum oscillations offer a direct probe of Fermi-surface topology and electronic degeneracy, yet disentangling both simultaneously across the Lifshitz transitions of multiband sy…
Longitudinal Nonreciprocal Charge Transport with Time Reversal Symmetry
Harsh Varshney, Amit Agarwal
Longitudinal nonreciprocal charge transport is usually associated with broken time-reversal symmetry, either from magnetic order or an external magnetic field. Here, we show that i…
Asymmetric Scattering Drives Large Nonlinear Nernst and Seebeck Effects
Harsh Varshney, Amit Agarwal
The nonlinear Nernst and Seebeck effects (NNE and NSE) offer promising routes for thermoelectric energy conversion in non-magnetic systems. While intrinsic mechanisms such as the n…
Spin band geometry drives intrinsic thermal spin magnetization and current
Sankar Sarkar, Harsh Varshney, Sayan Sarkar +1
Generating spin magnetization and spin currents without magnetic or electric fields is a key frontier in spin caloritronics. Spin responses driven by thermal gradients offer a prom…
Detecting Lifshitz Transitions Using Nonlinear Conductivity in Bilayer Graphene
Tanweer Ahmed, Harsh Varshney, Bao Q. Tu +6
The second-order nonlinear electrical response (NLER) is an intrinsic property of inversion symmetry-broken systems which can provide deep insights into the electronic band structu…
Planar Nernst effect from hidden band geometry in layered two-dimensional materials
Rahul Biswas, Harsh Varshney, Amit Agarwal
The Nernst effect is a versatile phenomenon relevant for energy harvesting, magnetic sensing, probing band topology and charge-neutral excitations. The planar Nernst effect (PNE) g…