Spin dephasing and pumping in graphene due to random spin-orbit interaction

Details Spin dephasing and pumping in graphene due to random spin-orbit interaction Spin dephasing and pumping in graphene due to random spin-orbit interaction

2010-12-21

arxiv.org/abs/1012.4757v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

9 pages, 7 figures

Scientific paper

We consider spin effects related to the random spin-orbit interaction in graphene. Such a random interaction can result from the presence of ripples and/or other inhomogeneities at the graphene surface. We show that the random spin-orbit interaction generally reduces the spin dephasing (relaxation) time, even if the interaction vanishes on average. Moreover, the random spin-orbit coupling also allows for spin manipulation with an external electric field. Due to the spin-flip interband as well as intraband optical transitions, the spin density can be effectively generated by periodic electric field in a relatively broad range of frequencies.

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