Session A11: Graphene: Transport in Devices and Structures

8:00 AM–11:00 AM, Monday, February 27, 2012
Room: 210B

Sponsoring Unit: DCMP
Chair: Xu Du, Stony Brook University

Abstract ID: BAPS.2012.MAR.A11.4

Abstract: A11.00004 : Quantum Transport in Double-gated Trilayer Graphene \textit{pnp} Junctions

8:36 AM–8:48 AM

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Authors:

  Yongjin Lee
    (Department of Physics and Astronomy, University of California, Riverside)

  Jairo Velasco Jr.
    (Department of Physics and Astronomy, University of California, Riverside)

  Lei Jing
    (Department of Physics and Astronomy, University of California, Riverside)

  Wenzhong Bao
    (Department of Physics and Astronomy, University of California, Riverside)

  David Tran
    (Department of Physics and Astronomy, University of California, Riverside)

  Marc Bockrath
    (Department of Physics and Astronomy, University of California, Riverside)

  Chun Ning (Jeanie) Lau
    (Department of Physics and Astronomy, University of California, Riverside)

Using trilayer graphene \textit{pnp} junctions with suspended top gates, we perform transport measurements. At a magnetic field B=0, by an applied perpendicular electric field, the conductance is increased that it is suggestive of a semi-metallic band overlap. At B=8T we observe quantum Hall conductance with fractional values, which can be explained equilibration of edge state between differentially-doped regions, and the presence of an insulating state at filling factor $\nu $=0.

To cite this abstract, use the following reference: http://meetings.aps.org/link/BAPS.2012.MAR.A11.4