Broken symmetry states in FeSe<sub>1-x</sub>S<sub>x</sub> measured with STM/S

ORAL

Abstract

We used scanning tunneling microscopy and spectroscopy to investigate the local symmetries of the electronic states in FeSe1-xSx. In tetragonal samples with x=0.23 , where nematic order is absent, our spectroscopic mapping experiments reveal a myriad of quasiparticle interference wave vectors in the -60 to 25 meV region, all of which are accurately captured by our and ARPES-calibrated theoretical simulations. The experiments also demonstrate the existence of a periodic pattern for states near the Fermi level that breaks both translational and rotational symmetry. These patterns are non-dispersive and are not seen in the theoretical calculations. Phenomenologically, this broken-symmetry state reminds us of the charge order in the cuprates, suggesting that strong electron correlations might be involved in its formation.

*This material is based upon work supported by the National Science Foundation under Grants No. 1845994 and No. 2034345. The synthesis was supported by the UC Laboratory Fees Research Program (LFR-20-653926). Some of the research described in this paper was carried out at the Canadian Light Source, a national research facility of the University of Saskatchewan, which is supported by the Canada Foundation for Innovation (CFI), the Natural Sciences and Engineering Research Council (NSERC), the National Research Council (NRC), the Canadian Institutes of Health Research (CIHR), the Government of Saskatchewan, and the University of Saskatchewan.This work was supported by the Alfred P. Sloan Fellowship (E.H.d.S.N.).

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Presenters

  • MORGAN A WALKER

    • University of California, Davis

Authors

  • MORGAN A WALKER

    • University of California, Davis

  • Journey K Byland

    • University of California, Davis

  • Timothy J Boyle

    • University of California, Davis

  • Adrian Gozar

    • Yale University

  • Zitong Zhao

    • Stevens Inst of Tech

  • Marvin A Muller

    • Ruhr Univ Bochum

  • Jakob Boeker

    • Ruhr Univ Bochum

  • Ryan Day

    • UC Berkeley
    • University of California, Berkeley

  • Matteo Michiardi

    • University of British Columbia

  • Sergey Zhadanovich

    • University of British Columbia

  • Sergey Gorovikov

    • Canadian Light Source
    • Canadian Lightsource

  • Tor Pedersen

    • Canadian Light Source
    • Canadian Lightsource

  • Andrea Damascelli

    • University of British Columbia
    • Department of Physics and Astronomy, University of British Columbia

  • Ilya Eremin

    • Ruhr Univ Bochum

  • Valentin Taufour

    • Department of Physics, University of California, Davis
    • University of California, Davis

  • Eduardo H Da Silva Neto

    • Yale University
    • University of California, Davis

  • Kirsty Scott

    • Yale University

  • Steffen Boetzel

    • Ruhr Univ Bochum