APS Logo

Long-Lived Isospin Excitations in Magic-Angle Twisted Bilayer Graphene

ORAL

Abstract

Magic-angle twisted bilayer graphene (MATBG) has emerged as a rich platform for exploring strongly correlated phenomena, including superconductivity and cascade behavior. Despite significant progress, the dynamics underlying these correlated states remain poorly understood. Here, we report on our study of isospin dynamics for MATBG using exciton sensing combined with optical pump-probe spectroscopy. Our findings reveal pronounced isospin fluctuations, providing new insights into the collective excitations within MATBG and highlighting a novel approach for studying dynamics in other graphene systems.

–

Publication: Xie, T., Xu, S., Dong, Z. et al. Long-lived isospin excitations in magic-angle twisted bilayer graphene. Nature 633, 77–82 (2024). https://doi.org/10.1038/s41586-024-07880-5

Presenters

  • Tian Xie

    University of California, Santa Barbara

Authors

  • Tian Xie

    University of California, Santa Barbara

  • Siyuan Xu

    UCSB, University of California, Santa Barbara, University of California Santa Barbara

  • Zhiyu Dong

    Caltech, Massachusetts Institute of Technology

  • Zhiyuan Cui

    University of California at Santa Barbara

  • Yunbo Ou

    Massachusetts Institute of Technology

  • Melike Erdi

    Arizona State University

  • 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

  • Sefaattin Tongay

    Arizona State University

  • Leonid Levitov

    Massachusetts Institute of Technology

  • Chenhao Jin

    University of California, Santa Barbara, Cornell University, University of California at Santa Barbara