We report pronounced magnetoconductance oscillations observed on suspended bilayer and trilayer graphene devices with mobilities up to 270,000 cm2/Vs. For bilayer devices, we observe conductance minima at all integer filling factors nu between 0 and -8, as well as a small plateau at {\nu}=1/3. For trilayer devices, we observe features at nu=-1, -2, -3 and -4, and at {\nu}~0.5 that persist to 4.5K at B=8T. All of these features persist for all accessible values of Vg and B, and could suggest the onset of symmetry breaking of the first few Landau (LL) levels and fractional quantum Hall states.
@article{arxiv.1005.0033,
title = {Magnetoconductance Oscillations in High-Mobility Suspended Bilayer and Trilayer Graphene},
author = {Wenzhong Bao and Zeng Zhao and Hang Zhang and Gang Liu and Philip Kratz and Lei Jing and Jairo Velasco and Dmitry Smirnov and Chun Ning Lau},
journal= {arXiv preprint arXiv:1005.0033},
year = {2015}
}