8 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…