Electronic structure and properties of heavy fermion system CeAuBi$_{\mathrm{2}}$

ORAL

Abstract

Rare-earth intermetallic compounds are an excellent platform to realize a variety of physical phenomena stemming from strong electron correlation, such as Kondo effect, Mott transition, and heavy fermion behavior. Here we present a study of the new heavy fermion compound CeAuBi$_{\mathrm{2}}$. This material exhibits spin-density-wave antiferromagnetic ordering below 13 K and a magnetic-field-tuned quantum critical point. The electronic structure was investigated with Angle Resolved Photoemission Spectroscopy (ARPES), which reveals a low energy spectrum dominated by strongly dispersing metallic bands and localized f-states with weak hybridization effects. By means of resonant ARPES we were able to selectively study the Ce$^{\mathrm{3+}}$ 4f character of the flat bands situated few meV from the Fermi level. The experimental dispersion is compared to ab-initio band structure calculations for a microscopic understanding of the electronic structure.

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Authors

  • Matteo Michiardi

    • Quantum Matter Institute, Department of Physics & Astronomy, University of British Columbia
    • Dept. of Physics, University of British Columbia,Vancouver, Canada

  • Fabio Boschini

    • Dept. of Physics, University of British Columbia,Vancouver, Canada

  • Elia Razzoli

    • Dept. of Physics, University of British Columbia,Vancouver, Canada

  • Giorgio Levy

    • Dept. of Physics, University of British Columbia,Vancouver, Canada

  • Ilya Elfimov

    • Dept. of Physics, University of British Columbia,Vancouver, Canada

  • Andrea Damascelli

    • Dept. of Physics, University of British Columbia,Vancouver, Canada

  • Soren Ulstrup

    • Advanced Light Source, E.O. LBNL, Berkeley, California, USA

  • Chris Jozwiak

    • Advanced Light Source, E.O. LBNL, Berkeley, California, USA

  • Aaron Bostwick

    • Advanced Light Source, E.O. LBNL, Berkeley, California, USA

  • Eli Rotenberg

    • Advanced Light Source, E.O. LBNL, Berkeley, California, USA

  • Halyna Hodovanets

    • Center for Nanophysics and Advanced Materials, University of Maryland, Maryland, USA

  • Chris Eckberg

    • Center for Nanophysics and Advanced Materials, University of Maryland, Maryland, USA

  • Johnpierre Paglione

    • Center for Nanophysics and Advanced Materials, University of Maryland, Maryland, USA