Unveiling electron correlation in semiconducting Heusler FeVSb by angle-resolved photoemission and dynamical mean field theory

ORAL

Abstract

Electron-electron correlations are responsible for many of the exotic properties of transition metal oxides and chalcogenides; however, the role of correlations in transition metal Heusler compounds is often overlooked. Here, combining angle-resolved photoemission spectroscopy (ARPES) and dynamical mean field theory (DMFT), we directly probe the single particle spectral function of the Heusler FeVSb. ARPES measurements on epitaxial FeVSb films reveal a mass renormalization of m* / mbare = 1.4, where mbare is the mass from DFT-LDA calculations that do not include a Hubbard U. This mass renormalization lies in dramatic contrast to other Heuslers LnPt(Sb,Bi) (Ln = lanthanide) [1-3] and CoTiSb [4], for which bare DFT calculations are in quantitative agreement with ARPES. By treating the many-body interactions more accurately at the level of DMFT, we quantitatively reproduce the measured electronic structure and comment on the differences between FeVSb and other Heuslers. Our work calls for a re-thinking of the role of correlations in FeVSb and in Heuslers more generally.

[1] H. Kim et. al., Sci. Adv., 4, 4 eaao4513 (2018)
[2] J. Logan et. al., Nature Comm. 7, 11993 (2016)
[3] Z. K. Liu et. al. , Nature Comm. 7, 12924 (2016)
[4] J. K. Kawasaki, et. al. Sci. Adv. 4, 6, eaar5832 (2018)

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Presenters

  • Estiaque Haidar Shourov

    • Materials Science and Engineering, University of Wisconsin Madison

Authors

  • Estiaque Haidar Shourov

    • Materials Science and Engineering, University of Wisconsin Madison

  • Patrick Strohbeen

    • Materials Science and Engineering, University of Wisconsin Madison
    • Materials Science and Engineering, University of Wisconsin-Madison

  • Sebastian Manzo

    • Materials Science and Engineering, University of Wisconsin Madison

  • Dongxue Du

    • Materials Science and Engineering, University of Wisconsin Madison

  • Fanny Rodolakis

    • Advanced Photon Source, Argonne National Laboratory
    • Advanced Photon Source

  • Jessica L McChesney

    • Advanced Photon Source, Argonne National Laboratory
    • Advanced Photon Source
    • Advanced Photon Source, Argonne National Laboratory, Lemont, IL, 60439, USA

  • Zach Krebs

    • Physics, University of Wisconsin Madison

  • Wyatt A Behn

    • Physics, University of Wisconsin Madison

  • Felipe Castro de Lima

    • Instituto de Física, Federal University of Uberlândia, Brazil
    • Universidade Federal de Uberlandia

  • Abhishek Sharan

    • Physics and Astronomy, University of Delaware
    • Univ of Delaware

  • Victor Brar

    • Physics, University of Wisconsin Madison
    • Physics, University of Wisconsin - Madison, Madison, WI USA

  • Anderson Janotti

    • Materials Science and Engineering, University of Delaware
    • Department of Materials Science and Engineering, University of Delaware
    • University of Delaware
    • Department of Materials Science & Engineering, University of Delaware
    • Department of Material Science and Engineering, University of Delaware
    • Univ of Delaware

  • Turan Birol

    • Chemical Engineering and Materials Science, University of Minnesota Twin Cities
    • University of Minnesota
    • Department of Chemical Engineering and Materials Science, University of Minnesota
    • University of Minnesota, Department of Chemical Engineering and Materials Science

  • Jason Kawasaki

    • Materials Science and Engineering, University of Wisconsin Madison
    • Materials Science, University of Wisconsin-Madison
    • Materials Science and Engineering, University of Wisconsin-Madison
    • Cornell University