| Pressure-Induced Isostructural Phase Transition and Correlation of FeAs Coordination with the Superconducting Properties of 111-Type Na(1-x)FeAs. | |
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MedLine Citation:
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PMID: 21528857 Owner: NLM Status: Publisher |
Abstract/OtherAbstract:
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The effect of pressure on the crystalline structure and superconducting transition temperature (T(c)) of the 111-type Na(1-x)FeAs system using in situ high-pressure synchrotron X-ray powder diffraction and diamond anvil cell techniques is studied. A pressure-induced tetragonal to tetragonal isostructural phase transition was found. The systematic evolution of the FeAs(4) tetrahedron as a function of pressure based on Rietveld refinements on the powder X-ray diffraction patterns was obtained. The nonmonotonic T(c)(P) behavior of Na(1-x)FeAs is found to correlate with the anomalies of the distance between the anion (As) and the iron layer as well as the bond angle of As-Fe-As for the two tetragonal phases. This behavior provides the key structural information in understanding the origin of the pressure dependence of T(c) for 111-type iron pnictide superconductors. A pressure-induced structural phase transition is also observed at 20 GPa. |
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Authors:
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Qingqing Liu; Xiaohui Yu; Xiancheng Wang; Zheng Deng; Yuxi Lv; Jinlong Zhu; Sijia Zhang; Haozhe Liu; Wenge Yang; Lin Wang; Hokwang Mao; Guoyin Shen; Zhong-Yi Lu; Yang Ren; Zhiqiang Chen; Zhijun Lin; Yusheng Zhao; Changqing Jin |
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Publication Detail:
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Type: JOURNAL ARTICLE Date: 2011-4-29 |
Journal Detail:
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Title: Journal of the American Chemical Society Volume: - ISSN: 1520-5126 ISO Abbreviation: - Publication Date: 2011 Apr |
Date Detail:
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Created Date: 2011-5-2 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 7503056 Medline TA: J Am Chem Soc Country: - |
Other Details:
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Languages: ENG Pagination: - Citation Subset: - |
Affiliation:
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Institute of Physics, Chinese Academy of Sciences , Beijing 100190, China. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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