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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