<sup>17</sup>O NMR studies of Sr<sub>2</sub>RuO<sub>4</sub> with applied uniaxial stresses beyond the Lifshitz transition

ORAL

Abstract

Experiments on uniaxially stressed Sr2RuO4 have resulted in substantial physical properties changes, including a factor 2.5 increase in the superconducting Tc, and an apparent breakdown of Fermi Liquid behavior in the normal state. Both are attributed to to a strain-induced passing of the Fermi energy through a van Hove singularity (vHs) [1]. Recent μSR measurements gave evidence for a magnetic phase transition at even greater stress [2]. Presented here are the results of 17O NMR spectroscopy and relaxation measurements. Enhanced relaxation rates characterize a phase boundary consistent with the proposed line of transitions. Nevertheless, within the low-symmetry phase, the NMR spectra are not broadened and (1/T1T) follows standard Fermi liquid behavior. We discuss the implications of these results, how they relate to the possible type of magnetic order, and the relationship of the reported magnetic order to the superconducting state.

[1] Steppke, A. et al. Science 355, eaaf9398 (2017).

[2] Grinenko, V., Ghosh, S., Sarkar, R. et al. Nat. Phys. 17, 748–754 (2021).

*A.C. acknowledges support from the Julian Schwinger Foundation. Work at UCLA was supported by the National Science Foundation under grant numbers 1709304, 2004553. Work at Los Alamos was supported by the Los Alamos National Laboratory LDRD Program. N.K. is supported by a KAKENHI Grants-in-Aids for Scientific Research (Grant Nos. 17H06136, 18K04715, and 21H01033), and Core-to-Core Program (No. JPJSCCA20170002) from the Japan Society for the Promotion of Science and by a JST-Mirai Program grant (No. JPMJMI18A3). J.M. acknowledges funding by the Slovenian Research Agency (ARRS) under Program No. P1-0044, J1-1696, and J1-2458. The work at Dresden was funded by the Deutsche Forschungsgemeinschaft -TRR 288 - 422213477 (projects A10 and B01).

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Presenters

  • Aaron M Chronister

    • University of California, Los Angeles

Authors

  • Aaron M Chronister

    • University of California, Los Angeles

  • Teresa Le

    • University of California, Los Angeles

  • Austin Baker

    • UCLA

  • Fabian Jerzembeck

    • Max Planck Institute for Chemical Physics of Solids

  • Dmitry A Sokolov

    • Max Planck Institute
    • Max Planck Institute for Chemical Physics of Solids

  • Eric D Bauer

    • Los Alamos Natl Lab
    • Los Alamos National Laboratory, Los Alamos, New Mexico 87545, U.S.A.
    • Los Alamos National Laboratory, Los Alamos, New Mexico, 87545, USA

  • Andrew Mackenzie

    • Max Planck Institute for Chemical Physics of Solids

  • Naoki Kikugawa

    • NIMS Tsukuba
    • National Institute for Materials Science

  • Clifford W Hicks

    • Max Planck Institute

  • Stuart E Brown

    • University of California, Los Angeles
    • UCLA