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Quantum Interference Noise Near the Dirac Point in Graphene

Effects of disorder on the electronic transport properties of graphene are strongly affected by the Dirac nature of the charge carriers in graphene. This is particularly pronounced near the Dirac point, where relativistic charge carriers cannot efficiently screen the impurity potential. We have studied time-dependent conductance fluctuations and magnetoresistance in graphene in the close vicinity of the Dirac point. We show that the fluctuations are due to the quantum interference effects due to scattering on impurities, and find an unusually large reduction of the relative noise power in magnetic field, possibly indicating that an additional symmetry plays an important role in this regime.

preprint2014arXivOpen access
Atikur RahmanJanice Wynn GuikemaNina Markovic
cond-mat.mes-hall
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Atikur RahmanJanice Wynn GuikemaNina Markovic

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