Universal conductance fluctuations as a direct probe to valley coherence and universality class of disordered graphene

Kochat, Vidya ; Pal, Atindra Nath ; Ghosh, Arindam (2013) Universal conductance fluctuations as a direct probe to valley coherence and universality class of disordered graphene AIP Conference Proceedings, 1566 . pp. 161-162. ISSN 1551-7616

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Official URL: http://aip.scitation.org/doi/abs/10.1063/1.4848335

Related URL: http://dx.doi.org/10.1063/1.4848335

Abstract

We demonstrate that the Universal Conductance Fluctuations (UCF) can be used as a direct probe to study the valley quantum states in disordered graphene. The UCF magnitude in graphene is suppressed by a factor of four at high carrier densities where the short-range disorder essentially breaks the valley degeneracy of the K and K' valleys, leading to a density dependent crossover of symmetry class from symplectic near the Dirac point to orthogonal at high densities.

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Deposited On:01 Feb 2018 10:04
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