Spin relaxation times in disordered graphene

Details Spin relaxation times in disordered graphene Spin relaxation times in disordered graphene

2007-02-19

arxiv.org/abs/cond-mat/0702433v2

Eur. Phys. J. Special Topics 148, 177-181 (2007)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

To appear in the Proceedings of the Graphene Conference, MPI PKS Dresden, September 2006. Corrected typos

Scientific paper

10.1140/epjst/e2007-00238-0

We consider two mechanisms of spin relaxation in disordered graphene. i) Spin relaxation due to curvature spin orbit coupling caused by ripples. ii) Spin relaxation due to the interaction of the electronic spin with localized magnetic moments at the edges. We obtain analytical expressions for the spin relaxation times, tau_SO and tau_J due to both mechanisms and estimate their values for realistic parameters of graphene samples. We obtain that spin relaxation originating from these mechanisms is very weak and spin coherence is expected in disordered graphene up to samples of length L ~ 1 micron.

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