Probing Pseudospin-mixing Potential in Graphene/Boron Nitride Moire Superlattice by Infrared Spectroscopy

ORAL

Abstract

Graphene/boron nitride (BN) Moire superlattice, where the slow superlattice period is superimposed on a fast B-N oscillation, provides an attractive approach to engineer the electron pseudospin in graphene that goes beyond an electrostatic. Here we perform micro-infrared spectroscopy on graphene/BN superlattice, and find that the BN substrate effect in the context of pseudo-spin is much richer than an electrostatic potential. We further show that the BN substrate effect can be modified through electrostatic gating.

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Authors

  • Zhiwen Shi

    • UC Berkeley

  • Chenhao Jin

    • UC Berkeley

  • Wei Yang

    • Institute of Physics, Chinese Academy of Sciences

  • Long Ju

    • UC Berkeley

  • Jason Horng

    • UC Berkeley

  • Guangyu Zhang

    • Institute of Physics, Chinese Academy of Sciences

  • Feng Wang

    • UC Berkeley and Lawrence Berkeley National Laboratory