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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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Luo, Yongkang1, Autor
Pustogow, A.1, Autor
Guzman, P.1, Autor
Dioguardi, A. P.1, Autor
Thomas, S. M.1, Autor
Ronning, F.1, Autor
Kikugawa, N.1, Autor
Sokolov, D. A.2, Autor           
Jerzembeck, F.2, Autor           
Mackenzie, A. P.3, Autor           
Hicks, C. W.4, Autor           
Bauer, E. D.1, Autor
Mazin, I. I.1, Autor
Brown, S. E.1, Autor
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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 Zusammenfassung: 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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Sprache(n): eng - English
 Datum: 2019-05-312019-05-31
 Publikationsstatus: Erschienen
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 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1103/PhysRevX.9.021044
 Art des Abschluß: -

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Titel: Physical Review X
  Kurztitel : Phys. Rev. X
Genre der Quelle: Zeitschrift
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Ort, Verlag, Ausgabe: New York, NY : American Physical Society
Seiten: - Band / Heft: 9 (2) Artikelnummer: 021044 Start- / Endseite: 1 - 9 Identifikator: Anderer: 2160-3308
CoNE: https://pure.mpg.de/cone/journals/resource/2160-3308