Boundary scattering in ballistic graphene

We report magnetotransport measurements in ballistic graphene mesoscopic wires where the charge carrier mean free path is comparable to the wire width W. Magnetoresistance curves show characteristic peak structures where the peak field scales with the ratio of cyclotron radius R(c) and wire width W...

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Bibliographic Details
Published in:Physical review letters 2012-07, Vol.109 (3), p.036601-036601, Article 036601
Main Authors: Masubuchi, Satoru, Iguchi, Kazuyuki, Yamaguchi, Takehiro, Onuki, Masahiro, Arai, Miho, Watanabe, Kenji, Taniguchi, Takashi, Machida, Tomoki
Format: Article
Language:English
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Summary:We report magnetotransport measurements in ballistic graphene mesoscopic wires where the charge carrier mean free path is comparable to the wire width W. Magnetoresistance curves show characteristic peak structures where the peak field scales with the ratio of cyclotron radius R(c) and wire width W as W/R(c)=0.9±0.1, due to diffusive boundary scattering. The obtained proportionality constant between R(c) and W differs from that of a classical semiconductor two-dimensional electron system in which W/R(c)=0.55.
ISSN:0031-9007
1079-7114
DOI:10.1103/PhysRevLett.109.036601