Harmonic generation in bent graphene with artificially-enhanced spin-orbit coupling
Abstract
We theoretically investigate the nonlinear response of bent graphene, in the presence of artificially-enhanced spin-orbit coupling, which can occur either via adatom deposition, or by placing the sheet of bent graphene in contact with a spin-orbit active substrate. We discuss the interplay between the spin-orbit coupling and the artificial magnetic field generated by the bending, for both the cases of Rashba and intrinsic spin-orbit coupling. For the latter, we introduce a spin-field interaction Hamiltonian addressing directly the electron spin as a degree of freedom. Our findings reveal that in this case, by controlling the amount of spin-orbit coupling, it is possible to significantly tune the spectrum of the nonlinear signal, achieving, in principle, efficient conversion of light from THz to UV region.
Cite
@article{arxiv.2204.11664,
title = {Harmonic generation in bent graphene with artificially-enhanced spin-orbit coupling},
author = {Arttu Nieminen and Marco Ornigotti},
journal= {arXiv preprint arXiv:2204.11664},
year = {2022}
}