<sup>17</sup>O NMR Studies Applied to the Uniaxial Stress-Tuned Fermi-Liquid Crossover in Sr<sub>2</sub>RuO<sub>4</sub>

ORAL

Abstract

Application of in-plane uniaxial stress to the quasi two-dimensional strongly correlated system Sr2RuO4 results in substantial changes of the physical properties, including a more than doubled superconducting transition temperature as well as normal state transport properties deviating from conventional Fermi-liquid behavior. Both observations are attributed to a nearby Lifshitz transition, associated with moving the Fermi energy through a van Hove singularity (vHs). 17O NMR measurements reveal that the Lifshitz point is accompanied by strong field and temperature dependence of the spin susceptibility, persisting to temperatures less than 100 mK. Our NMR measurements indicate that the non-Fermi-liquid behavior is strongly influenced by the proximity of the Lifshitz transition and a large Stoner enhancement, in a system where three energy scales are nearly balanced: width of vHs, as well as Zeeman and thermal energies.

*This work was supported by the National Science Foundation (DMR-1709304) and Los Alamos Laboratory Directed Research and Development (LDRD) program.

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Presenters

  • Aaron Chronister

    • University of California, Los Angeles

Authors

  • Aaron Chronister

    • University of California, Los Angeles

  • Andrej Pustogow

    • Department of Physics and Astronomy, University of California, Los Angeles
    • University of California, Los Angeles
    • 1. Physikalisches Institut, Universität Stuttgart

  • Yongkang Luo

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

  • Naoki Kikugawa

    • Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
    • National Institute for Material Science, Tsukuba, Ibaraki
    • National Institute for Materials Science, Tsukuba
    • National Institute for Materials Science
    • Quantum Transport Properties Group, National Institute for Materials Science (NIMS), Tsukuba 305-0003, Japan
    • National Institute for Material Science

  • Dmitry Sokolov

    • Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
    • Max-Planck-Institut for Chemical Physics of Solids
    • Max Planck Institute for Chemical Physics of Solids

  • Fabian Jerzembeck

    • Max Planck Institute for Chemical Physics of Solids

  • Andrew Mackenzie

    • Max-Planck-Institute for Chemical Physics of Solids
    • Max Planck Institute for Chemical Physics of Solids
    • Max Planck Institute for Chemical Physics of Solids, Dresden,Germany
    • Max Planck Institute for Chemical Physics of Solids, Dresden, Germany
    • Max Planck Institute for Chemical Physics of Solids, 01187 Dresden, Germany
    • Max-Planck-Institut for Chemical Physics of Solids
    • Physics of Quantum Materials, Max Planck Institute of Chemical Physics of Solids

  • Clifford Hicks

    • Max Planck Institute for Chemical Physics of Solids

  • Eric Bauer

    • Los Alamos National Laboratory, Los Alamos, NM 87545, USA
    • Los Alamos National Laboratory
    • MPA-CMMS, Los Alamos National Laboratory, Los Alamos, USA
    • MPA-CMMS, Los Alamos National Laboratory
    • Los Alamos National Laboratory, Los Alamos, New Mexico, USA
    • Los Alamos National Labs

  • Stuart E Brown

    • Univ of California - Los Angeles
    • Department of Physics and Astronomy, University of California, Los Angeles
    • University of California, Los Angeles