Unraveling the mesoscale surface and electronic structure in Co3Sn2S2

ORAL

Abstract

Co3Sn2S2 is a Magnetic Weyl Semimetal with multiple mesoscale cleave terminations for its crystal. These terminations have been observed to alter the topological surface states that connect the Weyl points. As a surface senstitive probe, photoemission-based methods are uniquely suited to studying electronic, chemical and atomic structure on the same mesoscales. Using micro-focused synchrotron photoemission, we identify signatures of different surface terminations in angle-resolved photemission, x-ray photoemission and photoelectron diffraction spectroscopies. This multi-technique approach for connecting surfacve atomic and electronicstructure is broadly applicable to any material with characteristic surface electronic structure that depends on variable surface chemistry.

*This research used resources of the Advanced Light Source, which is a DOE Office of Science User Facility under contract no. DE-AC02-05CH11231. SAS was supported in part by an ALS Doctoral Fellowship in Residence. Financial support was also provided by BSF Grant 2020067

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Presenters

  • Sudheer Anand Sreedhar

    • University of California, Davis

Authors

  • Sudheer Anand Sreedhar

    • University of California, Davis

  • Robert Prater

    • University of California, Davis

  • Zihao Shen

    • Uc Davis
    • University of California, Davis

  • Giuseppina Conti

    • Lawrence Berkeley National Laboratory

  • Slavomir Nemsak

    • Lawrence Berkeley National Laboratory

  • Aaron Bostwick

    • Lawrence Berkeley National Lab
    • Lawrence Berkeley National Laboratory
    • Berkeley National Lab
    • Advanced Light Source
    • The Advanced Light Source, Lawrence Berkeley National Laboratory
    • Advanced Light Source, Lawrence Berkeley National Laboratory

  • Christopher Jozwiak

    • Lawrence Berkeley National Lab
    • Lawrence Berkeley National Laboratory
    • Berkeley National Lab
    • Advanced Light Source
    • The Advanced Light Source, Lawrence Berkeley National Laboratory
    • Advanced Light Source, Lawrence Berkeley National Laboratory

  • Eli Rotenberg

    • Lawrence Berkeley National Laboratory

  • Makoto Hashimoto

    • SLAC - Natl Accelerator Lab

  • Donghui Lu

    • SLAC - Natl Accelerator Lab

  • Valentin Taufour

    • UC Davis
    • University of California, Davis

  • Sergey Y Savrasov

    • University of California, Davis

  • Inna M Vishik

    • University of California, Davis