| Growth and transport properties of CaFeAsF_(1-x) single crystals |
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| 引用本文： | TAO Jian,LI Sheng,ZHU XiYu,YANG Huan,WEN HaiHu. Growth and transport properties of CaFeAsF_(1-x) single crystals[J]. 中国科学:物理学 力学 天文学(英文版), 2014, 57(4): 632-636. DOI: 10.1007/s11433-014-5422-4 |
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| 作者姓名： | TAO Jian LI Sheng ZHU XiYu YANG Huan WEN HaiHu |
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| 作者单位： | Center |
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| 基金项目： | supported by the National Basic Research Program of China(Grant Nos.2011CBA00102,2010CB923002 and 2012CB821403);the National Natural Science Foundation of China and a Project Funded by the Priority Academic Program Development of Jiangsu Higher Education Institutions |
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| 摘 要： | Using self-flux method,we have successfully grown the parent phase of the single crystals of CaFeAsF1-x.The X-ray di?raction indicates good crystallinity.In-plane resistivity shows a bad metallic behavior with a sharp drop of resistivity at about T SDW=119K.This anomaly is associated with the possible spin density wave(SDW)order.Interestingly near T SDW,the resistivity exhibits a cusp-like feature,which may be understood as the strong coupling effect between the electrons and the antiferromagnetic(AF)spin fluctuations.A reduction of fluorine or application of a high pressure will suppress the SDW feature and induce superconductivity.Hall effect measurements reveal a positive Hall coefficient below T SDW indicating a dominant role of the hole-like charge carriers in the parent phase.Strong magnetoresistance has been observed below T SDW suggesting multiple conduction channels of the charge carriers.
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| 关 键 词： | CaFeAsF -x single crystal antiferromagnetic spin order multiple conduction channels |
Growth and transport properties of CaFeAsF1−x single crystals |
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| Jian Tao,Sheng Li,XiYu Zhu,Huan Yang,HaiHu Wen. Growth and transport properties of CaFeAsF1−x single crystals[J]. Science China Physics, Mechanics and Astronomy, 2014, 57(4): 632-636. DOI: 10.1007/s11433-014-5422-4 |
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| Authors: | Jian Tao Sheng Li XiYu Zhu Huan Yang HaiHu Wen |
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| Affiliation: | 1. Center for Superconducting Physics and Materials, National Laboratory of Solid State Microstructures and Department of Physics, Nanjing University, Nanjing, 210093, China
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| Abstract: | Using self-flux method,we have successfully grown the parent phase of the single crystals of CaFeAsF1-x.The X-ray di?raction indicates good crystallinity.In-plane resistivity shows a bad metallic behavior with a sharp drop of resistivity at about T SDW=119K.This anomaly is associated with the possible spin density wave(SDW)order.Interestingly near T SDW,the resistivity exhibits a cusp-like feature,which may be understood as the strong coupling effect between the electrons and the antiferromagnetic(AF)spin fluctuations.A reduction of fluorine or application of a high pressure will suppress the SDW feature and induce superconductivity.Hall effect measurements reveal a positive Hall coefficient below T SDW indicating a dominant role of the hole-like charge carriers in the parent phase.Strong magnetoresistance has been observed below T SDW suggesting multiple conduction channels of the charge carriers. |
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| Keywords: | CaFeAsF -x single crystal antiferromagnetic spin order multiple conduction channels |
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