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Van Hove singularity and stress-induced Fermi surface tuning in Sr<sub>2</sub>RuO<sub>4</sub>

ORAL

Abstract

Application of in-plane uniaxial stress to the quasi-2D correlated material Sr2RuO4 results in pronounced changes to the physical properties; most widely recognized is a factor 2.5 increase in superconducting transition temperature. The normal state is also significantly impacted. Reported here are 17O NMR hyperfine shifts over a wide range of stress, field, and temperature. Results are compared to renormalized 3-band Wannier models constructed from DFT calculations. The crossover temperature to standard Fermi Liquid properties is observed to be tuned continuously from TFL=30 K to 0 K with applied stress. Furthermore, the combination of correlations and the stress-controlled proximity of EF to a van Hove singularity are the main factors in determining the normal state properties for temperatures of order 300 K and below.

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Presenters

  • Aaron Chronister

    University of California, Los Angeles

Authors

  • Aaron Chronister

    University of California, Los Angeles

  • Manuel Zingl

    Center For Computational Quantum Physics, Flatiron Institute, Flatiron Institute

  • Andrej Pustogow

    University of California, Los Angeles, Department of Physics and Astronomy, University of California, University of Stuttgart

  • Yongkang Luo

    University of California, Los Angeles, Huazhong University of Science & Technology, Huazhong University of Science and Technology

  • Yue-Shun Su

    University of California, Los Angeles

  • Andrew Mackenzie

    Max Planck Institute for Chemical Physics of Solids, Dresden, Germany, Max Planck Institute for Chemical Physics of Solids, Max Planck Institute for the Chemical Physics of Solids

  • Clifford W Hicks

    Max Planck Institute for Chemical Physics of Solids, Dresden, Germany, Max Planck Institute for Chemical Physics of Solids, Chemical Physics of Solids, Max Planck Institute, Max Planck Institute for the Chemical Physics of Solids

  • Eric D Bauer

    Los Alamos National Laboratory, Los Alamos National Lab, Los Alamos National laboratory, Los Alamos Natl Lab, Condensed Matter and Magnet Science Group, Los Alamos National Laboratory, Los Alamos National LAborator

  • Naoki Kikugawa

    National Institute for Materials Science, Tsukuba, Japan, National Institute for Material Science, Tsukuba Japan, National Institute for Materials Science, National Institute for Material Science, Japan

  • Jernej Mravlje

    Jozef Stefan Institute, Ljubljana, Slovenia, Institute Jozef Stefan

  • Antoine Georges

    Center for Computational Quantum Physics, Flatiron Institute, Flatiron Institute

  • Stuart Brown

    University of California, Los Angeles