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High resolution imaging of broken symmetry states in Hofstadter bands

ORAL

Abstract

Hofstadter spectrum provides a new platform to study the interplay between band topology and strong electron-electron interaction. While previous studies have identified incompressible states at both integer and fractional fillings of Hofstadter bands, little is known about their microscopic nature and corresponding possible symmetries. We use scanning tunneling microscopy (STM) to directly image the Hofstadter states in the Bernal-stacked bilayer graphene (BLG) fully aligned with h-BN at high magnetic fields and identify their symmetries.

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Presenters

  • Yen-Chen Tsui

    Princeton University

Authors

  • Yen-Chen Tsui

    Princeton University

  • Minhao He

    Princeton University

  • Taige Wang

    University of California, Berkeley

  • Kenji Watanabe

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

  • Takashi Taniguchi

    National Institute for Materials Science, International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Research Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-0044, Japan, International Center for Materials Nanoarchitectonics, National Institute of Material Science, Tsukuba, Japan, Advanced Materials Laboratory, National Institute for Materials Science

  • Michael P Zaletel

    University of California, Berkeley

  • Ali Yazdani

    Princeton University