| Doping dependence of the pressure response of Tc in the SmO(1-x)F(x)FeAs superconductors. | |
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MedLine Citation:
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PMID: 18582060 Owner: NLM Status: PubMed-not-MEDLINE |
Abstract/OtherAbstract:
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The superconducting transition temperature of the high-Tc SmO1-xFxFeAs superconductors increases monotonically as the F-doping level x increases to 0.20. High-pressure magnetization experiments reveal a strong sensitivity of Tc to interatomic distances in the underdoped regime (x </= 0.12) with the pressure coefficient of Tc, d(ln Tc)/dP being strongly positive. However, as the doping level increases further to x = 0.15, we find that this sensitivity is strongly suppressed and at the same time, d(ln Tc)/dP sharply switches over to assume negative values with Tc decreasing with increasing applied pressure. The abrupt change in the pressure response of the superconducting properties of the SmO1-xFxFeAs phases coincides with the putative existence of a quantum critical point (QCP) near x approximately 0.14, as proposed by resistivity and Hall effect measurements. |
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Authors:
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Yasuhiro Takabayashi; Martin T McDonald; Dionisis Papanikolaou; Serena Margadonna; G Wu; R H Liu; X H Chen; Kosmas Prassides |
Publication Detail:
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Type: Journal Article Date: 2008-06-27 |
Journal Detail:
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Title: Journal of the American Chemical Society Volume: 130 ISSN: 1520-5126 ISO Abbreviation: J. Am. Chem. Soc. Publication Date: 2008 Jul |
Date Detail:
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Created Date: 2008-07-17 Completed Date: 2008-09-02 Revised Date: 2008-12-23 |
Medline Journal Info:
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Nlm Unique ID: 7503056 Medline TA: J Am Chem Soc Country: United States |
Other Details:
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Languages: eng Pagination: 9242-3 Citation Subset: - |
Affiliation:
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Department of Chemistry, University of Durham, Durham DH1 3LE, UK. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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