Origins of Nonlocality near the Dirac Point in Graphene

We present an experimental study of nonlocal electrical signals near the Dirac point in graphene. The in-plane magnetic field dependence of the nonlocal signal confirms the role of spin in this effect, as expected from recent predictions of Zeeman spin Hall effect in graphene, but our experiments sh...

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Bibliographic Details
Published inarXiv.org
Main Authors Renard, Julien, Studer, Matthias, Folk, Joshua A
Format Paper Journal Article
LanguageEnglish
Published Ithaca Cornell University Library, arXiv.org 26.09.2013
Subjects
Dependence
Graphene
Hall effect
Parameter sensitivity
Physics - Mesoscale and Nanoscale Physics
Temperature effects
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Summary:We present an experimental study of nonlocal electrical signals near the Dirac point in graphene. The in-plane magnetic field dependence of the nonlocal signal confirms the role of spin in this effect, as expected from recent predictions of Zeeman spin Hall effect in graphene, but our experiments show that thermo-magneto-electric effects also contribute to nonlocality, and the effect is sometimes stronger than that due to spin. Thermal effects are seen to be very sensitive to sample details that do not influence other transport parameters.
ISSN:2331-8422
DOI:10.48550/arxiv.1309.7016