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