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arXiv · 1205.5150

Boundary Scattering in Ballistic Graphene

Satoru Masubuchi·Kazuyuki Iguchi·Takehiro Yamaguchi·Masahiro Onuki·Miho Arai·Kenji Watanabe·Takashi Taniguchi·Tomoki Machida
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Abstract

We report magnetotransport measurements in ballistic graphene/hexagonal boron nitride mesoscopic wires where the charge carrier mean free path is comparable to wire width $W$. Magnetoresistance curves show characteristic peak structures where the peak field scales with the ratio of cyclotron radius $R_\textrm{c}$ and wire width $W$ as $W/R_\textrm{c} = 0.9 \pm 0.1$, due to diffusive boundary scattering. The obtained proportionality constant between $R_\textrm{c}$ and $W$ differs from that of a classical semiconductor 2D electron system where $W/R_\textrm{c} = 0.55$.

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Satoru Masubuchi, Kazuyuki Iguchi, Takehiro Yamaguchi, Masahiro Onuki, Miho Arai, Kenji Watanabe, Takashi Taniguchi, Tomoki Machida. 2012-05-23. Boundary Scattering in Ballistic Graphene. https://doi.org/10.1103/physrevlett.109.036601

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