Transport measurements across a tunable potential barrier in graphene

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dc.creatorHuard, B.
dc.creatorSulpizio, J. A.
dc.creatorStander, N.
dc.creatorTodd, K.
dc.creatorYang, B.
dc.creatorGoldhaber-Gordon, D.
dc.date2007-04-20
dc.date2007-06-07
dc.date.accessioned2026-07-07T08:10:34Z
dc.date.available2026-07-07T08:10:34Z
dc.descriptionThe peculiar nature of electron scattering in graphene is among many exciting theoretical predictions for the physical properties of this material. To investigate electron scattering properties in a graphene plane, we have created a gate-tunable potential barrier within a single-layer graphene sheet. We report measurements of electrical transport across this structure as the tunable barrier potential is swept through a range of heights. When the barrier is sufficiently strong to form a bipolar junctions (npn or pnp) within the graphene sheet, the resistance across the barrier sharply increases. We compare these results to predictions for both diffusive and ballistic transport, as the barrier rises on a length scale comparable to the mean free path. Finally, we show how a magnetic field modifies transport across the barrier.
dc.description5 pages, 5 figures
dc.identifierhttps://arxiv.org/abs/0704.2626
dc.identifierhttp://arxiv.org/abs/0704.2626
dc.identifierPhysical Review Letters 98, 236803 (2007)
dc.identifierdoi:10.1103/PhysRevLett.98.236803
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/131860
dc.subjectMesoscale and Nanoscale Physics
dc.titleTransport measurements across a tunable potential barrier in graphene
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