DMFT+NRG study of orbital differentiation in three-orbital Hubbard models

ORAL

Abstract

The orbital-selective Mott phase (OSMP) in multi-orbital Hubbard models has been of high interest for a long time. While it has early been understood [1] that different bandwidths of the orbitals can lead to different critical interaction energies, the OSMP solely driven by crystal-field splitting (CFS) is more intricate. Here, we present a real-frequency dynamical mean-field theory and numerical renormalization group (DMFT+NRG) analysis of the OSMP driven by CFS in a three-orbital model and illustrate the singular Fermi-liquid properties of this phase [2]. On the example of Sr2RuO4, we show how our method can be used to study low-energy physics in a real-materials framework.

[1] V.I. Anisimov et al., EPJB 25, 191-201 (2002)
[2] M. Greger et al., arXiv:1312.0100 (2013)

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Presenters

  • Fabian B. Kugler

    • Ludwig-Maximilians-Universität München, Munich, Germany
    • LMU

Authors

  • Fabian B. Kugler

    • Ludwig-Maximilians-Universität München, Munich, Germany
    • LMU

  • Seung-Sup B. Lee

    • Ludwig-Maximilians-Universität München, Munich, Germany
    • Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-University of Munich, Germany

  • Manuel Zingl

    • Center for Computational Quantum Physics, Flatiron Institute
    • Flatiron Institute - Simons Foundation, New York, USA
    • Center for Computational Quantum Physics, Simons Foundation Flatiron Institute

  • Antoine Georges

    • Collège de France
    • College de France
    • CCQ, Flatiron Institute, Simons Foundation
    • Center for Computational Quantum Physics, Flatiron Institue
    • Flatiron Institute - Simons Foundation, New York, USA
    • Center for Computational Quantum Physics, Flatiron Institute, NY, NY, 10010
    • CCQ, Flatiron Institute
    • Center for Computational Quantum Physics, Flatiron Institute

  • Gabriel Kotliar

    • Rutgers University and Brookhaven National Laboratories
    • Department of Condensed Matter Physics and Materials Science, Upton, New York 11973, USA, Brookhaven National Laboratory
    • Rutgers University, New Brunswick
    • Brookhaven National Laboratory
    • Department of Physics, Rutgers University
    • Physics, Rutgers University
    • Rutgers University, New Jersey, USA
    • Physics and Astronomy Department, Rutgers University
    • Department of Physics and Astronomy, Rutgers University, NJ

  • Jan Von Delft

    • Arnold Sommerfeld Centre for Theoretical Physics, Ludwig-Maximilians University
    • Ludwig-Maximilians-Universität München, Munich, Germany
    • University of Munich
    • Arnold Sommerfeld Center for Theoretical Physics, Ludwig-Maximilians-University of Munich, Germany

  • Andreas Weichselbaum

    • Brookhaven National Laboratory
    • Brookhaven National Laboratory, New York, USA
    • Brookhaven National Lab
    • Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, NY