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Correlation-driven organic 3D topological insulator with relativistic fermions

Author

Listed:
  • Tetsuya Nomoto

    (the University of Tokyo
    Osaka University)

  • Shusaku Imajo

    (the University of Tokyo)

  • Hiroki Akutsu

    (Osaka University)

  • Yasuhiro Nakazawa

    (Osaka University)

  • Yoshimitsu Kohama

    (the University of Tokyo)

Abstract

Exploring new topological phenomena and functionalities induced by strong electron correlation has been a central issue in modern condensed-matter physics. One example is a topological insulator (TI) state and its functionality driven by the Coulomb repulsion rather than a spin-orbit coupling. Here, we report a ‘correlation-driven’ TI state realized in an organic zero-gap system α-(BETS)2I3. The topological surface state and chiral anomaly are observed in temperature and field dependences of resistance, indicating a three-dimensional TI state at low temperatures. Moreover, we observe a topological phase switching between the TI state and non-equilibrium Dirac semimetal state by a dc current, which is a unique functionality of a correlation-driven TI state. Our findings demonstrate that correlation-driven TIs are promising candidates not only for practical electronic devices but also as a field for discovering new topological phenomena and phases.

Suggested Citation

  • Tetsuya Nomoto & Shusaku Imajo & Hiroki Akutsu & Yasuhiro Nakazawa & Yoshimitsu Kohama, 2023. "Correlation-driven organic 3D topological insulator with relativistic fermions," Nature Communications, Nature, vol. 14(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:14:y:2023:i:1:d:10.1038_s41467-023-37293-3
    DOI: 10.1038/s41467-023-37293-3
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    References listed on IDEAS

    as
    1. Z.F Wang & Zheng Liu & Feng Liu, 2013. "Organic topological insulators in organometallic lattices," Nature Communications, Nature, vol. 4(1), pages 1-5, June.
    2. F. Sawano & I. Terasaki & H. Mori & T. Mori & M. Watanabe & N. Ikeda & Y. Nogami & Y. Noda, 2005. "An organic thyristor," Nature, Nature, vol. 437(7058), pages 522-524, September.
    3. Hui Li & Hongtao He & Hai-Zhou Lu & Huachen Zhang & Hongchao Liu & Rong Ma & Zhiyong Fan & Shun-Qing Shen & Jiannong Wang, 2016. "Negative magnetoresistance in Dirac semimetal Cd3As2," Nature Communications, Nature, vol. 7(1), pages 1-7, April.
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