4 citations · 4 across the 9 of their papers we have counts for
11 papers
All optical ultrafast pure spin current in the altermagnet CrSO
Deepika Gill, Ruikai Wu, Peter Elliott +2
All-optical generation of pure spin current -- the flow of spin in the absence of a corresponding charge flow -- relies on a symmetry based compensation of valley charge. The 2d $d…
Ultrafast ghost Hall states in a 2d altermagnet
Ruikai Wu, Deepika Gill, Sangeeta Sharma +1
Two-dimensional materials that exhibit optically active spin and valley degrees of freedom represent one of the most fascinating -- and potentially most technologically useful -- p…
Valley polarization of graphene via the saddle point
Deepika Gill, Sangeeta Sharma, Peter Elliott +2
Graphene, and other members of the monolayer Xene family, represent an ideal materials platform for "valleytronics", the control of valley localized charge excitations. The absence…
Generation of pure, spin polarized, and unpolarized charge currents at the few cycle limit of circularly polarized light
Deepika Gill, Sangeeta Sharma, Sam Shallcross
In certain members of the transition metal dichalcogenide (TMDC) family, laser pulses of oppositely circularly polarized light excite electrons of opposite spin. Here we show that…
Tunable magnons in a dual-gated 2D antiferromagnet
Nele Stetzuhn, Abhijeet M. Kumar, Sviatoslav Kovalchuk +12
The layered antiferromagnet CrSBr features magnons coupled to other quasiparticles, including excitons and polaritons, enabling their easy optical accessibility. In this work, we i…
Coupled femto-excitons, free carriers and light
Deepika Gill, Sam Shallcross, Wenhan Chen +2
Non-equilibrium quantum matter generated by ultrafast laser light opens new pathways in fundamental condensed matter physics, as well as offering rich control possibilities in "tai…
Ultrafast Saddletronics
Sangeeta Sharma, Deepika Gill, John Kay Dewhurst +2
Low energy valleys in the band structure of 2d materials represent a potential route to the ultrafast writing of information in quantum matter by laser light, with excited charge a…
Giant moment increase by ultrafast laser light
Sangeeta Sharma, Deepika Gill, Jyoti Krishna +3
It is now well established that a few femtosecond laser pulse will induce an ultrafast loss of moment in a magnetic material. Here we show that the opposite effect can also occur:…
Creation and control of valley currents in graphene by few cycle light pulses
Deepika Gill, Sangeeta Sharma, Sam Shallcross
Well established for the visible spectrum gaps of the transition metal dichalcogenide family, valleytronics - the control of valley charge and current by light - is comparatively u…
Spin texture in weak topological insulators: the role of bulk states and band bending
F. Rost, R. Gupta, S. Sharma +2
We derive the spin texture of a weak topological insulator via a supersymmetric approach that includes the roles of the bulk gap edge states and surface band bending. We find the s…
Moiré ordered current loops in the graphene twist bilayer
D. Weckbecker, M. Fleischmann, R. Gupta +6
While a typical material exhibits field induced currents only at the boundary, a uniform out-of-plane magnetic field applied to two mutually rotated layers of graphene is shown to…