Giant nonlocality near the dirac point in graphene

D. A. Abanin; S. V. Morozov; L. A. Ponomarenko; R. V. Gorbachev; A. S. Mayorov; M. I. Katsnelson; K. Watanabe; T. Taniguchi; K. S. Novoselov; L. S. Levitov; A. K. Geim

doi:10.1126/science.1199595

Giant nonlocality near the dirac point in graphene

D. A. Abanin, S. V. Morozov, L. A. Ponomarenko, R. V. Gorbachev, A. S. Mayorov, M. I. Katsnelson, K. Watanabe, T. Taniguchi, K. S. Novoselov, L. S. Levitov, A. K. Geim

Physics

Research output: Contribution to journal › Article › peer-review

230 Scopus citations

Abstract

Transport measurements have been a powerful tool for discovering electronic phenomena in graphene. We report nonlocal measurements performed in the Hall bar geometry with voltage probes far away from the classical path of charge flow. We observed a large nonlocal response near the Dirac point in fields as low as 0.1 tesla, which persisted up to room temperature. The nonlocality is consistent with the long-range flavor currents induced by the lifting of spin/valley degeneracy. The effect is expected to contribute strongly to all magnetotransport phenomena near the neutrality point.

Original language	English (US)
Pages (from-to)	328-330
Number of pages	3
Journal	Science
Volume	332
Issue number	6027
DOIs	https://doi.org/10.1126/science.1199595
State	Published - Apr 15 2011

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title = "Giant nonlocality near the dirac point in graphene",

abstract = "Transport measurements have been a powerful tool for discovering electronic phenomena in graphene. We report nonlocal measurements performed in the Hall bar geometry with voltage probes far away from the classical path of charge flow. We observed a large nonlocal response near the Dirac point in fields as low as 0.1 tesla, which persisted up to room temperature. The nonlocality is consistent with the long-range flavor currents induced by the lifting of spin/valley degeneracy. The effect is expected to contribute strongly to all magnetotransport phenomena near the neutrality point.",

author = "Abanin, {D. A.} and Morozov, {S. V.} and Ponomarenko, {L. A.} and Gorbachev, {R. V.} and Mayorov, {A. S.} and Katsnelson, {M. I.} and K. Watanabe and T. Taniguchi and Novoselov, {K. S.} and Levitov, {L. S.} and Geim, {A. K.}",

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T1 - Giant nonlocality near the dirac point in graphene

AU - Abanin, D. A.

AU - Morozov, S. V.

AU - Ponomarenko, L. A.

AU - Gorbachev, R. V.

AU - Mayorov, A. S.

AU - Katsnelson, M. I.

AU - Watanabe, K.

AU - Taniguchi, T.

AU - Novoselov, K. S.

AU - Levitov, L. S.

AU - Geim, A. K.

PY - 2011/4/15

Y1 - 2011/4/15

N2 - Transport measurements have been a powerful tool for discovering electronic phenomena in graphene. We report nonlocal measurements performed in the Hall bar geometry with voltage probes far away from the classical path of charge flow. We observed a large nonlocal response near the Dirac point in fields as low as 0.1 tesla, which persisted up to room temperature. The nonlocality is consistent with the long-range flavor currents induced by the lifting of spin/valley degeneracy. The effect is expected to contribute strongly to all magnetotransport phenomena near the neutrality point.

AB - Transport measurements have been a powerful tool for discovering electronic phenomena in graphene. We report nonlocal measurements performed in the Hall bar geometry with voltage probes far away from the classical path of charge flow. We observed a large nonlocal response near the Dirac point in fields as low as 0.1 tesla, which persisted up to room temperature. The nonlocality is consistent with the long-range flavor currents induced by the lifting of spin/valley degeneracy. The effect is expected to contribute strongly to all magnetotransport phenomena near the neutrality point.

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Giant nonlocality near the dirac point in graphene

Abstract

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