Imaging Wigner crystal (part II)

ORAL

Abstract

At partial filling of a Landau level, strong electron interaction dominates the suppressed kinetic energy thus drives formation of a variety of fractional quantum Hall states and electron solids. Using scanning tunneling microscopy, we show direct imaging of the Wigner crystal, a triangular electron lattice, at small filling fractions in Bernal stacked bilayer graphene and identify its phase space at high magnetic field. We reveal microscopic details of the Wigner crystal and discuss how it is affected by disorder potential. We also explore the phase space of the Wigner crystal at different magnetic fields and temperatures.

* We thank DOE, Moore Foundation, NSF-DMR, NSF-MRSEC, and ONR for funding support.

–

Presenters

  • Minhao He

    Princeton University

Authors

  • Minhao He

    Princeton University

  • Yen-Chen Tsui

    Princeton University

  • Yuwen Hu

    Princeton University

  • Taige Wang

    University of California, Berkeley

  • Ethan A Lake

    University of California, Berkeley

  • Kenji Watanabe

    National Institute for Materials Science, NIMS, Research Center for Electronic and Optical Materials, National Institute for Materials Science, Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan, National Institute for Material Science

  • Takashi Taniguchi

    Kyoto Univ, National Institute for Materials Science, Research Center for Materials Nanoarchitectonics, Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, National Institute for Materials Sciences, NIMS, International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan, National Institute for Material Science, International Center for Materials Nanoarchitectonics, NIMS, Japan, International Center for Materials Nanoarchitectonics, Tsukuba, National Institue for Materials Science, Kyoto University, National Institute of Materials Science, International Center for Materials Nanoarchitectonics and National Institute for Materials Science

  • Michael P Zaletel

    University of California, Berkeley, University of Berkerley, UC Berkeley

  • Ali Yazdani

    Princeton University