气候变化领域集成服务门户(CCPortal): High-sensitivity heat-capacity measurements on Sr2RuO4 under uniaxial pressure

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DOI	10.1073/pnas.2020492118
	High-sensitivity heat-capacity measurements on Sr2RuO4 under uniaxial pressure
	Li Y.-S.; Kikugawa N.; Sokolov D.A.; Jerzembeck F.; Gibbs A.S.; Maeno Y.; Hicks C.W.; Schmalian J.; Nicklas M.; Mackenzie A.P.
发表日期	2021
ISSN	00278424
卷号	118 期号:10
英文摘要	A key question regarding the unconventional superconductivity of Sr2RuO4 remains whether the order parameter is single- or two-component. Under a hypothesis of two-component superconductivity, uniaxial pressure is expected to lift their degeneracy, resulting in a split transition. The most direct and fundamental probe of a split transition is heat capacity. Here, we report measurement of heat capacity of samples subject to large and highly homogeneous uniaxial pressure. We place an upper limit on the heat-capacity signature of any second transition of a few percent of that of the primary superconducting transition. The normalized jump in heat capacity, ∆C/C, grows smoothly as a function of uniaxial pressure, favoring order parameters which are allowed to maximize in the same part of the Brillouin zone as the well-studied van Hove singularity. Thanks to the high precision of our measurements, these findings place stringent constraints on theories of the superconductivity of Sr2RuO4 © 2021 National Academy of Sciences. All rights reserved.
英文关键词	Heat capacity; Superconductivity; Uniaxial pressure
语种	英语
scopus关键词	article; heat; superconductivity
来源期刊	Proceedings of the National Academy of Sciences of the United States of America
文献类型	期刊论文
条目标识符	http://gcip.llas.ac.cn/handle/2XKMVOVA/180397
作者单位	Max Planck Institute for Chemical Physics of Solids, Dresden, 01187, Germany; Scottish Universities Physics Alliance, School of Physics and Astronomy, University of St Andrews, St Andrews, KY16 9SS, United Kingdom; National Institute for Materials Science, Tsukuba, 305-0003, Japan; ISIS Facility, Science and Technology Facilities Council Rutherford Appleton Laboratory, Didcot, OX11 0QX, United Kingdom; Department of Physics, Graduate School of Science, Kyoto University, Kyoto, 606-8502, Japan; Institut für Theorie der Kondensierten Materie, Karlsruher Institut für Technologie, Karlsruhe, 76131, Germany; Institut für Quantenmaterialien und Technologien, Karlsruher Institut für Technologie, Karlsruhe, 76131, Germany
推荐引用方式 GB/T 7714	Li Y.-S.,Kikugawa N.,Sokolov D.A.,et al. High-sensitivity heat-capacity measurements on Sr2RuO4 under uniaxial pressure[J],2021,118(10).
APA	Li Y.-S..,Kikugawa N..,Sokolov D.A..,Jerzembeck F..,Gibbs A.S..,...&Mackenzie A.P..(2021).High-sensitivity heat-capacity measurements on Sr2RuO4 under uniaxial pressure.Proceedings of the National Academy of Sciences of the United States of America,118(10).
MLA	Li Y.-S.,et al."High-sensitivity heat-capacity measurements on Sr2RuO4 under uniaxial pressure".Proceedings of the National Academy of Sciences of the United States of America 118.10(2021).