8 papers
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:…