Boundary Scattering in Ballistic Graphene
  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 $W/R_\textrm{c} = 0.55$. 
Satoru Masubuchi, Kazuyuki Iguchi, Takehiro Yamaguchi, Masahiro Onuki,   Miho Arai, Kenji Watanabe, Takashi Taniguchi, and T...
cond-mat.mes-hall