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arXiv · 1012.4757

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

V. K. Dugaev·E. Ya. Sherman·J. Barnas
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Abstract

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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V. K. Dugaev, E. Ya. Sherman, J. Barnas. 2010-12-21. Spin dephasing and pumping in graphene due to random spin-orbit interaction. https://doi.org/10.1103/physrevb.83.085306

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