212 citations · 1.5k across the 55 of their papers we have counts for
4 papers · 1 filter
Transport signatures of surface potentials on three-dimensional topological insulators
Sthitadhi Roy, Sourin Das
The spin-momentum locked nature of the robust surface states of three dimensional topological insulators (3D TI) make them promising candidates for spintronics applications. Surfac…
Wavepacket dynamics on Chern band lattices in a trap
Sthitadhi Roy, Adolfo G. Grushin, Roderich Moessner +1
The experimental realization of lattices with Chern bands in ultracold-atom and photonic systems has motivated the study of time-dependent phenomena, such as spatial propagation, i…
Response of fermions in Chern bands to spatially local quenches
Adolfo G. Grushin, Sthitadhi Roy, Masudul Haque
We study the dynamical evolution of Chern-band systems after subjecting them to local quenches. For open-boundary systems, we show for half-filling that the chiral nature of edge s…
Pseudospin-valve effect on transport in junctions of three-dimensional topological insulator surfaces
Sthitadhi Roy, Krishanu Roychowdhury, Sourin Das
We show that the surface states of pristine 3D topological insulators (TIs) are analogs of ferromagnetic half metals due to complete polarization of an emergent momentum independen…