title: Magnetoconductance oscillations and evidence for fractional quantum Hall states in suspended bilayer and trilayer graphene.
abstract: We report pronounced magnetoconductance oscillations observed on suspended bilayer and trilayer graphene devices with mobilities up to 270,000 cm²/V s. For bilayer devices, we observe conductance minima at all integer filling factors ν between 0 and -8, as well as a small plateau at ν=1/3. For trilayer devices, we observe features at ν=-1, -2, -3, and -4, and at ν∼0.5 that persist to 4.5 K at B=8 T. 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 levels and fractional quantum Hall states.
authors.affiliation: Department of Physics, University of California, Riverside, Riverside, California 92521, USA.
authors.forename: Wenzhong
authors.initials: W
authors.lastname: Bao
authors.forename: Zeng
authors.initials: Z
authors.lastname: Zhao
authors.forename: Hang
authors.initials: H
authors.lastname: Zhang
authors.forename: Gang
authors.initials: G
authors.lastname: Liu
authors.forename: Philip
authors.initials: P
authors.lastname: Kratz
authors.forename: Lei
authors.initials: L
authors.lastname: Jing
authors.forename: Jairo
authors.initials: J
authors.lastname: Velasco
authors.forename: Dmitry
authors.initials: D
authors.lastname: Smirnov
authors.forename: Chun Ning
authors.initials: CN
authors.lastname: Lau