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  Evidence for even parity unconventional superconductivity in Sr2RuO4

Chronister, A., Pustogow, A., Kikugawa, N., Sokolov, D. A., Jerzembeck, F., Hicks, C. W., et al. (2021). Evidence for even parity unconventional superconductivity in Sr2RuO4. Proceedings of the National Academy of Sciences of the United States of America, 118(25): e2025313118, pp. 1-5. doi:10.1073/pnas.2025313118.

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 Urheber:
Chronister, Aaron1, Autor
Pustogow, Andrej1, Autor
Kikugawa, Naoki1, Autor
Sokolov, Dmitry A.2, Autor           
Jerzembeck, Fabian2, Autor           
Hicks, Clifford W.3, Autor           
Mackenzie, Andrew P.4, Autor           
Bauer, Eric D.1, Autor
Brown, Stuart 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              
3Clifford Hicks, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863466              
4Andrew Mackenzie, Physics of Quantum Materials, Max Planck Institute for Chemical Physics of Solids, Max Planck Society, ou_1863463              

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Schlagwörter: Unconventional superconductivity | triplet pairing | Knight shift | nuclear magnetic resonance | order parameter, article, heat, nuclear magnetic resonance, parity, polarization, superconductivity
 Zusammenfassung: Unambiguous identification of the superconducting order parameter symmetry in Sr2RuO4 has remained elusive for more than a quarter century. While a chiral p-wave ground state analogue to superfluid 3He-A was ruled out only very recently, other proposed triplet-pairing scenarios are still viable. Establishing the condensate magnetic susceptibility reveals a sharp distinction between even-parity (singlet) and odd-parity (triplet) pairing since the superconducting condensate is magnetically polarizable only in the latter case. Here field-dependent 17O Knight shift measurements, being sensitive to the spin polarization, are compared to previously reported specific heat measurements for the purpose of distinguishing the condensate contribution from that due to quasiparticles. We conclude that the shift results can be accounted for entirely by the expected field-induced quasiparticle response. An upper bound for the condensate magnetic response of < 10% of the normal state susceptibility is sufficient to exclude all purely odd-parity candidates. © 2021 National Academy of Sciences. All rights reserved.

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Sprache(n): eng - English
 Datum: 2021-06-142021-06-14
 Publikationsstatus: Erschienen
 Seiten: -
 Ort, Verlag, Ausgabe: -
 Inhaltsverzeichnis: -
 Art der Begutachtung: -
 Identifikatoren: DOI: 10.1073/pnas.2025313118
 Art des Abschluß: -

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Titel: Proceedings of the National Academy of Sciences of the United States of America
  Andere : PNAS
  Andere : Proceedings of the National Academy of Sciences of the USA
  Kurztitel : Proc. Natl. Acad. Sci. U. S. A.
Genre der Quelle: Zeitschrift
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Affiliations:
Ort, Verlag, Ausgabe: Washington, D.C. : National Academy of Sciences
Seiten: - Band / Heft: 118 (25) Artikelnummer: e2025313118 Start- / Endseite: 1 - 5 Identifikator: ISSN: 0027-8424
CoNE: https://pure.mpg.de/cone/journals/resource/954925427230