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Evidence was reported for ''p''-wave singlet state as in cuprates and conventional superconductors, instead of the conjectured more unconventional ''p''-wave [[triplet state]].<ref>{{Cite journal|last1=Chronister|first1=Aaron|last2=Pustogow|first2=Andrej|last3=Kikugawa|first3=Naoki|last4=Sokolov|first4=Dmitry A.|last5=Jerzembeck|first5=Fabian|last6=Hicks|first6=Clifford W.|last7=Mackenzie|first7=Andrew P.|last8=Bauer|first8=Eric D.|last9=Brown|first9=Stuart E.|date=2021-06-22|title=Evidence for even parity unconventional superconductivity in Sr<sub>2</sub>RuO<sub>4</sub>|journal=Proceedings of the National Academy of Sciences|language=en|volume=118|issue=25|doi=10.1073/pnas.2025313118 |pmc=8237678|issn=0027-8424|pmid=34161272|arxiv=2007.13730|bibcode=2021PNAS..11825313C|doi-access=free }}</ref><ref>{{Cite journal|last=Lopatka|first=Alex|date=2021-08-05|title=An unconventional superconductor isn't so odd after all|journal=Physics Today|volume=2021|pages=0805a|url=https://physicstoday.scitation.org/do/10.1063/PT.6.1.20210805a/abs/|language=en|doi=10.1063/PT.6.1.20210805a|s2cid=241654779}}</ref> It has also been suggested that Strontium ruthenate superconductivity could be due to a [[Fulde–Ferrell–Larkin–Ovchinnikov phase]].<ref>{{Cite journal |last1=Kinjo |first1=K. |last2=Manago |first2=M. |last3=Kitagawa |first3=S. |last4=Mao |first4=Z. Q. |last5=Yonezawa |first5=S. |last6=Maeno |first6=Y. |last7=Ishida |first7=K. |date=2022-04-22 |title=Superconducting spin smecticity evidencing the Fulde-Ferrell-Larkin-Ovchinnikov state in Sr 2 RuO 4 |url=https://www.science.org/doi/10.1126/science.abb0332 |journal=Science |language=en |volume=376 |issue=6591 |pages=397–400 |doi=10.1126/science.abb0332 |pmid=35446631 |bibcode=2022Sci...376..397K |s2cid=248322696 |issn=0036-8075}}</ref><ref>{{Cite journal |date=2022-06-13 |title=Magnetic field induces spatially varying superconductivity |url=https://physicstoday.scitation.org/do/10.1063/PT.6.1.20220613a/full |journal=Physics Today |language=en |volume=2022 |issue=1 |pages=0613a |doi=10.1063/PT.6.1.20220613a|bibcode=2022PhT..2022a.613. |s2cid=249659408 }}</ref>
Strontium ruthenate behaves as a conventional [[Fermi liquid]] at temperatures below 25 K.<ref>{{cite book|last=Yanoff|first=Brian|title=Temperature dependence of the penetration depth in the unconventional superconductor Sr<sub>2</sub>RuO<sub>4</sub>|year=2000|publisher=University of Illinois at Urbana-Champaign|url=http://groups.mrl.uiuc.edu/dvh/theses/yanoff.pdf|access-date=2012-04-16|archive-date=2012-09-16|archive-url=https://web.archive.org/web/20120916164016/http://groups.mrl.uiuc.edu/dvh/theses/yanoff.pdf|url-status=dead}}</ref>
In [[2023]], a team of researchers from the [[University of Illinois Urbana-Champaign]] confirmed the 67-year-old prediction of [[Pines' Demon|Pines' demon]] excitation in Sr<sub>2</sub>RuO<sub>4</sub>.<ref>{{cite journal |last1=Abbamonte |first1=Peter |title=Pines’ demon observed as a 3D acoustic plasmon in Sr2RuO4 |journal=[[Nature (journal)|Nature]] |date=August 9, 2023 |volume=45 |doi=10.1038/s41586-023-06318-8 |url=https://www.nature.com/articles/s41586-023-06318-8 |access-date=August 10, 2023}}</ref>
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