Angle Resolved Photoemission Measurements of Metastable Single Crystals of Tetragonal CoSe

ORAL

Abstract

Using topochemical deintercalation methods, single crystals of the tetragonal phase of Cobalt Selenide, isostructural to the iron based superconductor FeSe, have recently been synthesized1,2. Here, we present synchrotron angle resolved photoemission (ARPES) measurements of these metastable crystals and compare to recent ARPES measurements of MBE synthesized thin films3 as well as density functional theory calculations4. We discuss similarities and differences between bulk tetragonal CoSe and FeSe in terms of correlation and renormalization effects on the band structure and the effects of dimensionality.

[1] Zhou et al. J. Am. Chem. Soc. 2016, 138
[2] Wilfong et al. Phys. Rev. B 2018, 97
[3] Shen et al. Phys. Rev. Materials 2018, 2
[4] Yang et al. Solid State Comm. 2019, 300

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Presenters

  • Christopher Parzyck

    • Cornell University

Authors

  • Christopher Parzyck

    • Cornell University

  • Xiuquan Zhou

    • Argonne National Laboratory

  • Brandon Wilfong

    • University of Maryland

  • Efrain Rodriguez

    • University of Maryland
    • University of Maryland, College Park

  • Kyle M Shen

    • Cornell University
    • Department of Physics, Cornell University, Cornell University
    • Department of Physics, Laboratory of Atomic and Solid State Physics, Cornell University
    • Laboratory of Atomic and Solid State Physics, Department of Physics, Kavli Institute at Cornell for Nanoscale Science, Cornell University