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Spin fluctuations in the exotic metallic state of Sr2RuO4 studied with β-NMR

D. L. Cortie, T. Buck, M. H. Dehn, R. F. Kiefl, C. D. P. Levy, R. M. L. McFadden, G. D. Morris, M. R. Pearson, Z. Salman, Y. Maeno, and W. A. MacFarlane
Phys. Rev. B 91, 241113(R) – Published 23 June 2015

Abstract

A β-NMR study was performed on a Sr2RuO4 crystal in the metallic state using a beam of spin-polarized Li+8 implanted at a mean depth of 90 nm. The Li+8 spin-lattice relaxation rate is strongly influenced by the onset of incommensurate spin fluctuations. The nuclear relaxation rate can be explained using previously published bulk O17 NMR and inelastic neutron spectroscopy measurements of the dynamic magnetic susceptibility to model the hyperfine coupling. A well-resolved quadrupolar-split NMR for Li+8 implies a static stopping position in an interstitial site. The Li+8 Knight shift is highly sensitive to the anisotropic static susceptibility.

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  • Received 14 February 2015
  • Revised 3 June 2015

DOI:https://doi.org/10.1103/PhysRevB.91.241113

©2015 American Physical Society

Authors & Affiliations

D. L. Cortie1,2,3,*, T. Buck2, M. H. Dehn4, R. F. Kiefl1,2,5, C. D. P. Levy5, R. M. L. McFadden3, G. D. Morris5, M. R. Pearson5, Z. Salman6, Y. Maeno7, and W. A. MacFarlane1,3

  • 1Quantum Matter Institute, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
  • 2Department of Physics and Astronomy, University of British Columbia, 6224 Agricultural Road, Vancouver, British Columbia, Canada V6T 1Z1
  • 3Chemistry Department, University of British Columbia, Vancouver, British Columbia, Canada V6T 1Z1
  • 4Physik-Department, Technische Universität München, James-Franck-Straße 1, 85748 Garching bei München, Germany
  • 5TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, Canada V6T 2A3
  • 6Laboratory for Muon Spin Spectroscopy, Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland
  • 7Quantum Materials Laboratory, Department of Physics, Kyoto University, Kyoto 606-8502, Japan

  • *cortie@phas.ubc.ca

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Vol. 91, Iss. 24 — 15 June 2015

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