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High Order Geometric Channels for Nonlinear Transport in Bloch Bands
Sami Farrag, Eugene Mele, Tony Low
We develop a geometric perturbation theory of Bloch states for perturbations coupling via the interband Berry connection. The gauge-invariant Bargmann trace builds the dressed disp…
Enhanced Spin Hall Response From Aligned Kramers-Weyl Points in High Chern Number Semimetals
C. O. Ascencio, Wei Jiang, D. J. P. de Sousa +3
We propose a spin Hall effect (SHE) enhancement mechanism due to Kramers-Weyl point (KWP) alignment in chiral topological semimetals with high Chern numbers (CNs). Through model Ha…
Helical boundary modes from synthetic spin in a plasmonic lattice
Sang Hyun Park, Michael Sammon, Eugene Mele +1
Artificial lattices have been used as a platform to extend the application of topological physics beyond electronic systems. Here, using the two-dimensional Lieb lattice as a proto…
Field-free-switching state diagram of perpendicular magnetization subjected to conventional and unconventional spin-orbit torques
D. J. P. de Sousa, P. M. Haney, J. P. Wang +1
The lack of certain crystalline symmetries in strong spin-orbit-coupled non-magnetic materials allows for the existence of uncoventional spin Hall responses, with electrically gene…
Spin Torque Generated by Valley Hall Effect in WSe2
D. J. P. de Sousa, M. J. Sammon, Raseong Kim +3
Monolayer transition metal dichalcogenides are promising materials for spintronics due to their robust spin-valley locked valence states, enabling efficient charge-to-spin conversi…
Plasmonic gain in current biased tilted Dirac nodes
Sang Hyun Park, Michael Sammon, Eugene Mele +1
Surface plasmons, which allow extreme confinement of light, suffer from high intrinsic electronic losses. It has been shown that stimulated emission of electrons can transfer energ…