Magnetoconductance Oscillations in High-Mobility Suspended Bilayer and Trilayer Graphene

Details Magnetoconductance Oscillations in High-Mobility Suspended Bilayer and Trilayer Graphene Magnetoconductance Oscillations in High-Mobility Suspended Bilayer and Trilayer Graphene

2010-04-30

arxiv.org/abs/1005.0033v2

PRL 105, 246601 (2010)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

to appear in Phys. Rev. Lett

Scientific paper

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.

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