Quantum Transport in Graphene pnp Junctions with Contactless Top Gates

ORAL

Abstract

Graphene offers the unique opportunity to explore relativistic physics in a condensed matter system. One such example is the phenomenon of klein tunneling in graphene pnp junctions. By using a contactless top gate, we are able to fabricate very high quality pnp junctions, and perform electrical transport spectroscopy measurements in zero and finite magnetic fields. We observe oscillations in conductance of the pnp junction and changes in magnetoresisitance. Latest experimental progress and comparison with theoretical predictions will be discussed.

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Authors

  • Jairo Velasco Jr.

    University of California at Riverside

  • Gang Liu

    University of California at Riverside, University of California, Riverside

  • Wenzhong Bao

    University of California at Riverside

  • Chun Ning Lau

    University of California at Riverside