Light-induced valley currents and magnetization in graphene rings
Mesoscale and Nanoscale Physics
2012-07-02 v1
Abstract
We study the non-equilibrium dynamics in a mesoscopic graphene ring excited by picoseconds shaped electromagnetic pulses. We predict an ultrafast buildup of charge polarization, currents and orbital magnetization. Applying the light pulses identified here, non-equilibrium valley currents are generated in a graphene ring threaded by a stationary magnetic flux. We predict a finite graphene ring magnetization even for a vanishing charge current; the magnetization emerges due to the light-induced difference of the valley populations.
Keywords
Cite
@article{arxiv.0910.1950,
title = {Light-induced valley currents and magnetization in graphene rings},
author = {A. S. Moskalenko and J. Berakdar},
journal= {arXiv preprint arXiv:0910.1950},
year = {2012}
}
Comments
4 pages, 2 figures, submitted to Phys. Rev. B