Parity and time-reversal symmetry breaking in twisted trilayer graphene

ORAL

Abstract

By examining the angular dependence of second-harmonic nonlinear response, we report a novel electronic order in twisted trilayer graphene, which is present throughout the entire moire flatband. This is evidenced by a one- or three-fold symmetric angular dependence in the nonreciprocal transport response. By analyzing its dependence on the magnetic field, current flow, and field-effect doping, we show that this parity and time-reversal-breaking order is distinct from the orbital ferromagnetism and nematicity. This discovery has important implications on our fundamental understandings of emergent phenomena in graphene moiré systems, such as the cascade of isospin transitions, superconductivity, nematicity and orbital ferromagnetism.

*N.J.Z. acknowledges support from the Jun-Qi fellowship. J.I.A.L. acknowledges funding from NSF DMR-2143384. K.W. and T.T. acknowledge support from the Elemental Strategy Initiative conducted by the MEXT, Japan (Grant Number JPMXP0112101001) and JSPS KAKENHI (Grant Numbers 19H05790, 20H00354 and 21H05233). The work at Massachusetts Institute of Technology was supported by a Simons Investigator Award from the Simons Foundation.

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Publication: Zhang, Naiyuan J., et al. "Diodic transport response and the loop current state in twisted trilayer graphene." arXiv preprint arXiv:2209.12964 (2022).

Presenters

  • Naiyuan J Zhang

    • Brown University

Authors

  • Naiyuan J Zhang

    • Brown University

  • Jiang-Xiazi Lin

    • Brown University

  • Yibang B Wang

    • Brown University

  • Takashi Taniguchi

    • National Institute for Materials Science
    • Kyoto Univ
    • International Center for Materials Nanoarchitectonics, National Institute of Materials Science
    • Kyoto University
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-044, Japan
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • National Institute for Materials Science, Japan
    • National Institute For Materials Science
    • NIMS
    • National Institute for Material Science
    • International Center for Materials Nanoarchitectonics, National Institute for Materials Science, Tsukuba, Japan
    • NIMS Japan

  • Kenji Watanabe

    • National Institute for Materials Science
    • Research Center for Functional Materials, National Institute of Materials Science
    • Research Center for Functional Materials, National Institute for Materials Science, 1-1 Namiki, Tsukuba 305-044, Japan
    • NIMS
    • Research Center for Functional Materials, National Institute for Materials Science
    • National Institute for Materials Science, Japan
    • Research Center for Functional Materials, National Institute for Materials Science, Tsukuba, Japan
    • NIMS Japan

  • Liang Fu

    • Massachusetts Institute of Technology MIT
    • Massachusetts Institute of Technology

  • Jia Li

    • Brown University