z/-z Symmetry of spin-orbit coupling and weak localization in graphene

Edward McCann; Vladimir I. Fal'ko

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z/-z Symmetry of spin-orbit coupling and weak localization in graphene

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arxiv 1111.5267 v1 pith:B6YK6QVR submitted 2011-11-22 cond-mat.mes-hall

Edward McCann , Vladimir I. Fal'ko This is my paper

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keywords couplingweakgraphenelocalizationeffectspin-orbitsymmetryanti-localization

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We show that the influence of spin-orbit (SO) coupling on the weak localization effect for electrons in graphene depends on the lack or presence of z/-z symmetry in the system. While for z/-z asymmetric SO coupling, disordered graphene should display a weak anti-localization behavior at lowest temperature, z/-z symmetric coupling leads to an effective saturation of decoherence time which can be partially lifted by an in-plane magnetic field, thus, tending to restore the weak localization effect.

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