Quenching of the quantum Hall effect in graphene with scrolled edges

Details Quenching of the quantum Hall effect in graphene with scrolled edges Quenching of the quantum Hall effect in graphene with scrolled edges

2011-11-18

arxiv.org/abs/1111.4437v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

Edge nanoscrolls are shown to strongly influence transport properties of suspended graphene in the quantum Hall regime. The relatively long arc length of the scrolls in combination with their compact transverse size results in formation of many nonchiral transport channels in the scrolls. They short-circuit the bulk current paths and inhibit the observation of the quantized two-terminal resistance. Unlike competing theoretical proposals, this mechanism of disrupting the Hall quantization in suspended graphene is not caused by ill-chosen placement of the contacts, singular elastic strains, or a small sample size.

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