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Switching of band inversion and topological surface states by charge density wave

Author

Listed:
  • N. Mitsuishi

    (The University of Tokyo
    Quantum-Phase Electronics Center (QPEC), The University of Tokyo)

  • Y. Sugita

    (The University of Tokyo)

  • M. S. Bahramy

    (The University of Tokyo
    Quantum-Phase Electronics Center (QPEC), The University of Tokyo
    RIKEN Center for Emergent Matter Science (CEMS))

  • M. Kamitani

    (The University of Tokyo
    Quantum-Phase Electronics Center (QPEC), The University of Tokyo)

  • T. Sonobe

    (The University of Tokyo
    Quantum-Phase Electronics Center (QPEC), The University of Tokyo)

  • M. Sakano

    (The University of Tokyo
    Quantum-Phase Electronics Center (QPEC), The University of Tokyo)

  • T. Shimojima

    (RIKEN Center for Emergent Matter Science (CEMS))

  • H. Takahashi

    (Osaka University)

  • H. Sakai

    (Osaka University)

  • K. Horiba

    (High Energy Accelerator Research Organization (KEK))

  • H. Kumigashira

    (High Energy Accelerator Research Organization (KEK))

  • K. Taguchi

    (Hiroshima University)

  • K. Miyamoto

    (Hiroshima University)

  • T. Okuda

    (Hiroshima University)

  • S. Ishiwata

    (Osaka University)

  • Y. Motome

    (The University of Tokyo)

  • K. Ishizaka

    (The University of Tokyo
    Quantum-Phase Electronics Center (QPEC), The University of Tokyo
    RIKEN Center for Emergent Matter Science (CEMS))

Abstract

Topologically nontrivial materials host protected edge states associated with the bulk band inversion through the bulk-edge correspondence. Manipulating such edge states is highly desired for developing new functions and devices practically using their dissipation-less nature and spin-momentum locking. Here we introduce a transition-metal dichalcogenide VTe2, that hosts a charge density wave (CDW) coupled with the band inversion involving V3d and Te5p orbitals. Spin- and angle-resolved photoemission spectroscopy with first-principles calculations reveal the huge anisotropic modification of the bulk electronic structure by the CDW formation, accompanying the selective disappearance of Dirac-type spin-polarized topological surface states that exist in the normal state. Thorough three dimensional investigation of bulk states indicates that the corresponding band inversion at the Brillouin zone boundary dissolves upon the CDW formation, by transforming into anomalous flat bands. Our finding provides a new insight to the topological manipulation of matters by utilizing CDWs’ flexible characters to external stimuli.

Suggested Citation

  • N. Mitsuishi & Y. Sugita & M. S. Bahramy & M. Kamitani & T. Sonobe & M. Sakano & T. Shimojima & H. Takahashi & H. Sakai & K. Horiba & H. Kumigashira & K. Taguchi & K. Miyamoto & T. Okuda & S. Ishiwata, 2020. "Switching of band inversion and topological surface states by charge density wave," Nature Communications, Nature, vol. 11(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:11:y:2020:i:1:d:10.1038_s41467-020-16290-w
    DOI: 10.1038/s41467-020-16290-w
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    Cited by:

    1. Junhyeon Jo & Jung Hwa Kim & Choong H. Kim & Jaebyeong Lee & Daeseong Choe & Inseon Oh & Seunghyun Lee & Zonghoon Lee & Hosub Jin & Jung-Woo Yoo, 2022. "Defect-gradient-induced Rashba effect in van der Waals PtSe2 layers," Nature Communications, Nature, vol. 13(1), pages 1-8, December.
    2. Shuvam Sarkar & Joydipto Bhattacharya & Pampa Sadhukhan & Davide Curcio & Rajeev Dutt & Vipin Kumar Singh & Marco Bianchi & Arnab Pariari & Shubhankar Roy & Prabhat Mandal & Tanmoy Das & Philip Hofman, 2023. "Charge density wave induced nodal lines in LaTe3," Nature Communications, Nature, vol. 14(1), pages 1-11, December.

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