Correlating local chemistry with electronic structure in magnetic Weyl semimetal Co<sub>3</sub>Sn<sub>2</sub>S<sub>2</sub>

ORAL

Abstract

Ultraviolet Angle-resolved photoemission spectroscopy (ARPES) is a surface sensitive technique, often probing only a few atomic layers below the surface, limited by the inelastic mean free path of the photoelectrons. Yet it remains a powerful and ubiquitous technique for direct visualization of electronic structure. This limitation often results in interesting interplay between local surface features and observed electronic structure. Importantly, topological quantum materials often have defining surface electronic structure which depends on the morphology of the exposed surface, necessitating simultaneous quantitative measurement of both the local surface chemistry and electronic structure. In this work we study the magnetic Weyl semimetal Co3Sn2S2 using ARPES and x-ray photoelectron spectroscopy (XPS) to establish how local surface chemistry, topological electronic structure, and strong electronic correlations interact with one another.

*BSF Grant 2020067 and UC Laboratory Fees Research Program (LFR-20-653926)

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Publication: "Electronic structure and topology across Tc in the magnetic Weyl semimetal Co3Sn2S2" Antonio Rossi et al. PRB 104, 105115 (Oct 2021)

Presenters

  • Sudheer Anand Sreedhar

    • University of California, Davis

Authors

  • Sudheer Anand Sreedhar

    • University of California, Davis

  • Robert Prater

    • University of California, Davis

  • Vsevolod Ivanov

    • Lawrence Berkeley National Lab
    • Molecular Foundry, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, USA
    • Lawrence Berkeley National Laboratory

  • Antonio Rossi

    • Lawrence Berkeley National Laboratory

  • Zihao Shen

    • University of California, Davis

  • Matthew C Staab

    • University of California, Davis

  • Ittai Sidilkover

    • Tel Aviv University

  • Makoto Hashimoto

    • SLAC - Natl Accelerator Lab

  • Donghui Lu

    • SLAC - Natl Accelerator Lab

  • Giuseppina Conti

    • Lawrence Berkeley National Lab

  • Slavomir Nemsak

    • Advanced Light Source
    • Lawrence Berkeley National Lab

  • Hadas Soifer

    • Tel Aviv University

  • Sergey Y Savrasov

    • University of California, Davis

  • Valentin Taufour

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

  • Inna M Vishik

    • University of California, Davis