Journal
PHYSICAL REVIEW LETTERS
Volume 107, Issue 3, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.107.036602
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- NRI through the INDEX Center
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We investigate transport in a gate-defined graphene quantum point contact in the quantum Hall regime. Edge states confined to the interface of p and n regions in the graphene sheet are controllably brought together from opposite sides of the sample and allowed to mix in this split-gate geometry. Among the expected quantum Hall features, an unexpected additional plateau at 0.5h/e(2) is observed. We propose that chaotic mixing of edge channels gives rise to the extra plateau.
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