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  Normal State 17O NMR Studies of Sr2RuO4 under Uniaxial Stress

Luo, Y., Pustogow, A., Guzman, P., Dioguardi, A. P., Thomas, S. M., Ronning, F., et al. (2019). Normal State 17O NMR Studies of Sr2RuO4 under Uniaxial Stress. Physical Review X, 9(2): 021044, pp. 1-9. doi:10.1103/PhysRevX.9.021044.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0003-E04A-D Version Permalink: http://hdl.handle.net/21.11116/0000-0004-C25E-8
Genre: Journal Article

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 Creators:
Luo, Yongkang1, Author
Pustogow, A.1, Author
Guzman, P.1, Author
Dioguardi, A. P.1, Author
Thomas, S. M.1, Author
Ronning, F.1, Author
Kikugawa, N.1, Author
Sokolov, D. A.2, Author              
Jerzembeck, F.2, Author              
Mackenzie, A. P.3, Author              
Hicks, C. W.4, Author              
Bauer, E. D.1, Author
Mazin, I. I.1, Author
Brown, S. E.1, Author
Affiliations:
1External Organizations, ou_persistent22              
2Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863462              
3Andrew Mackenzie, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863463              
4Clifford Hicks, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863466              

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 Abstract: The effects of uniaxial compressive stress on the normal state O-17 nuclear-magnetic-resonance properties of the unconventional superconductor Sr2RuO4 are reported. The paramagnetic shifts of both planar and apical oxygen sites show pronounced anomalies near the nominal a-axis strain epsilon(aa) (math) epsilon(v) that maximizes the superconducting transition temperature T-c. The spin susceptibility weakly increases on lowering the temperature below T similar or equal to 10 K, consistent with an enhanced density of states associated with passing the Fermi energy through a van Hove singularity. Although such a Lifshitz transition occurs in the gamma band formed by the Ru d(xy )states hybridized with in-plane O p(pi) orbitals, the large Hund's coupling renormalizes the uniform spin susceptibility, which, in turn, affects the hyperfine fields of all nuclei. We estimate this "Stoner" renormalization S by combining the data with first-principles calculations and conclude that this is an important part of the strain effect, with implications for superconductivity.

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Language(s): eng - English
 Dates: 2019-05-312019-05-31
 Publication Status: Published in print
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Method: -
 Identifiers: DOI: 10.1103/PhysRevX.9.021044
 Degree: -

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Title: Physical Review X
  Abbreviation : Phys. Rev. X
Source Genre: Journal
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Publ. Info: New York, NY : American Physical Society
Pages: - Volume / Issue: 9 (2) Sequence Number: 021044 Start / End Page: 1 - 9 Identifier: Other: 2160-3308
CoNE: https://pure.mpg.de/cone/journals/resource/2160-3308