Development of a ferromagnetic component in the superconducting state of Fe-excess Fe1.12 Te1-x Sex by electronic charge redistribution

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題名:	Development of a ferromagnetic component in the superconducting state of Fe-excess Fe1.12 Te1-x Sex by electronic charge redistribution
作者:	李其紘;Li, Wen-Hsien;Karna, Sunil K.;Hsu, Han;Li, Chi-Yen;Lee, Chi-Hung;Sankar, Raman;Cheng Chou, Fang
貢獻者:	理學院物理學系
關鍵詞:	639/301/119/1003;639/766/119/1003;639/766/119/2793;Alliances;Computer memory;Crystals;Humanities and Social Sciences;Iron;Magnetic properties;Magnetic susceptibility;Magnetism;multidisciplinary;Random access memory;Science;Thermal expansion
日期:	2015-06-16
上傳時間:	2026-04-23 11:51:15 (UTC+8)
出版者:	Nature Publishing Group;London: Nature Publishing Group UK
摘要:	摘要： The general picture established so far for the links between superconductivity and magnetic ordering in iron chalcogenide Fe 1+y (Te 1-x Se x ) is that the substitution of Se for Te directly drives the system from the antiferromagnetic end into the superconducting regime. Here, we report on the observation of a ferromagnetic component that developed together with the superconducting transition in Fe-excess Fe 1.12 Te 1-x Se x crystals using neutron and x-ray diffractions, resistivity, magnetic susceptibility and magnetization measurements. The superconducting transition is accompanied by a negative thermal expansion of the crystalline unit cell and an electronic charge redistribution, where a small portion of the electronic charge flows from around the Fe sites toward the Te/Se sites. First-principles calculations show consistent results, revealing that the excess Fe ions play a more significant role in affecting the magnetic property in the superconducting state than in the normal state and the occurrence of an electronic charge redistribution through the superconducting transition. 其他題名： Sci Rep 出版者： London: Nature Publishing Group UK 出版日期： 2015-06-16 出處： Scientific reports, 2015-06, Vol.5 (1), p.10951, Article 10951 資源來源： Publicly Available Content Database (Proquest) 版權： The Author(s) 2015 版權： Copyright Nature Publishing Group Jun 2015 版權： Copyright © 2015, Macmillan Publishers Limited 2015 Macmillan Publishers Limited 識別號： ISSN: 2045-2322 識別號： EISSN: 2045-2322 識別號： DOI: 10.1038/srep10951 識別號： PMID: 26077466
顯示於類別:	[物理學系] 期刊論文

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