Field-tunable correlated states in H-stacked twisted MoS2.

ORAL

Abstract

Twisted transition metal dichalcogenide bilayers offer a versatile platform for exploring strongly correlated states. Here, we study near H-stacked MoS2 bilayers that realize a multiorbital Hubbard model. The theoretically predicted ultra-flat moire bands at both the valence and conduction band edges strongly enhance electron correlation effects, observable in excitonic spectra. We study the evolution of these correlations under electric and magnetic fields, demonstrating their robustness and tunability arising from the system's unique layer, valley, and orbital degrees of freedom.

*Collaborations at UT-Austin have been enabled by support from the National Science Foundation via MRSEC grants DMR-2308817. Xiaohui Liu, K. Hao, X. Liu acknowledge the support by the Department of Energy, Basic Energy Science program via grant DE-SC0019398 and via contract DE- AC02-76SF00515 for sample preparation effort. H. Yan gratefully acknowledges a fellowship from the Texas Quantum Institute and support from the United States Army Research Office under Grant No. W911NF-25-1-0232.

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Presenters

  • Xiaoxiao Yu

    • University of Texas at Austin

Authors

  • Xiaoxiao Yu

    • University of Texas at Austin

  • Zhida Liu

    • University of Texas at Austin

  • Hongtao Yan

    • University of Texas at Austin

  • Xiangcheng Liu

    • University of Texas at Austin

  • Xiaohui Liu

    • University of Texas at Austin

  • Kai Hao

    • University of Texas at Austin

  • Kenji Watanabe

    • National Institute for Materials Science
    • Research Center for Functional Materials, National Institute of Materials Science, 1-1 Namiki Tsukuba, Ibaraki 305-0044, Japan

  • Takashi Taniguchi

    • National Institute for Materials Science
    • Research Center for Materials Nanoarchitectonics, National Institute for Materials Science
    • International Center for Materials Nanoarchitectonics, National Institute of Materials Science, 1-1 Namiki Tsukuba, Ibaraki 305-0044, Japan
    • Research Center for Functional Materials, National Institute of Materials Science, 1-1 Namiki Tsukuba, Ibaraki 305-0044, Japan

  • Chih-Kang Shih

    • University of Texas at Austin

  • Keji Lai

    • University of Texas at Austin

  • Mit Naik

    • University of Texas, Austin
    • University of Texas at Austin
    • The University of Texas at Austin

  • Xiaoqin Elaine Li

    • University of Texas at Austin