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Low-energy electronic structure in the unconventional charge-ordered state of ScV6Sn6

Author

Listed:
  • Asish K. Kundu

    (Brookhaven National Laboratory)

  • Xiong Huang

    (Columbia University)

  • Eric Seewald

    (Columbia University)

  • Ethan Ritz

    (University of Minnesota)

  • Santanu Pakhira

    (Iowa State University
    Maulana Azad National Institute of Technology)

  • Shuai Zhang

    (Columbia University)

  • Dihao Sun

    (Columbia University)

  • Simon Turkel

    (Columbia University)

  • Sara Shabani

    (Columbia University)

  • Turgut Yilmaz

    (Brookhaven National Laboratory)

  • Elio Vescovo

    (Brookhaven National Laboratory)

  • Cory R. Dean

    (Columbia University)

  • David C. Johnston

    (Iowa State University
    Iowa State University)

  • Tonica Valla

    (Donostia International Physics Center (DIPC))

  • Turan Birol

    (University of Minnesota)

  • Dmitri N. Basov

    (Columbia University)

  • Rafael M. Fernandes

    (University of Minnesota)

  • Abhay N. Pasupathy

    (Brookhaven National Laboratory
    Columbia University)

Abstract

Kagome vanadates AV3Sb5 display unusual low-temperature electronic properties including charge density waves (CDW), whose microscopic origin remains unsettled. Recently, CDW order has been discovered in a new material ScV6Sn6, providing an opportunity to explore whether the onset of CDW leads to unusual electronic properties. Here, we study this question using angle-resolved photoemission spectroscopy (ARPES) and scanning tunneling microscopy (STM). The ARPES measurements show minimal changes to the electronic structure after the onset of CDW. However, STM quasiparticle interference (QPI) measurements show strong dispersing features related to the CDW ordering vectors. A plausible explanation is the presence of a strong momentum-dependent scattering potential peaked at the CDW wavevector, associated with the existence of competing CDW instabilities. Our STM results further indicate that the bands most affected by the CDW are near vHS, analogous to the case of AV3Sb5 despite very different CDW wavevectors.

Suggested Citation

  • Asish K. Kundu & Xiong Huang & Eric Seewald & Ethan Ritz & Santanu Pakhira & Shuai Zhang & Dihao Sun & Simon Turkel & Sara Shabani & Turgut Yilmaz & Elio Vescovo & Cory R. Dean & David C. Johnston & T, 2024. "Low-energy electronic structure in the unconventional charge-ordered state of ScV6Sn6," Nature Communications, Nature, vol. 15(1), pages 1-9, December.
    • Handle: RePEc:nat:natcom:v:15:y:2024:i:1:d:10.1038_s41467-024-48883-0
    DOI: 10.1038/s41467-024-48883-0
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