Quantum transport in high-quality Bilayer Graphene pnp Junctions

ORAL

Abstract

Using high-quality bilayer grapheme pnp junctions with suspended top gates, we perform transport measurements. At a magnetic field B=0, by an applied perpendicular electric field, band gap opens at 260mK. Within the band gap, we demonstrate the conductance decreases exponentially by 3 orders of magnitude with increasing electric field and this can be explained by variable range hopping with a gate-tunable density of states, effective mass, and localization length.

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Authors

  • Yongjin Lee

    • Department of Physics, University of California, Riverside, California 92521

  • Lei Jing

    • Department of Physics, University of California, Riverside, California 92521

  • Jairo Velasco Jr.

    • Department of Physics, University of California, Riverside, California 92521

  • Philip Kratz

    • Department of Physics, University of California, Riverside, California 92521

  • Gang Liu

    • Department of Physics, University of California, Riverside, California 92521

  • Wenzhong Bao

    • Department of Physics, University of California, Riverside, California 92521

  • Marc Bockrath

    • Department of Physics, University of California, Riverside, California 92521

  • Chun Ning Lau

    • Department of Physics, University of California, Riverside, California 92521