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Exploration of iron-chalcogenide superconductors

ISSN号：1674-1056
期刊名称：Chinese Physics B
时间：2013.8.8
页码：-
分类：O482.5[理学—固体物理;理学—物理] TM262[电气工程—电工理论与新技术;一般工业技术—材料科学与工程]
作者机构：[1]Department of Physics, Zhejiang University, Hangzhou 310027, China, [2]Department of Physics, Hangzhou Normal University, Hangzhou 310016, China
相关基金：Project supported by the National Basic Research Program of China （Grant No s. 2011CBA00103, 2012CB821404, and 2009CB929104）, the National Nat- ural Science Foundation of China （Grant Nos. 10974175, 10934005, and 11204059）, the Natural Science Foundation of Zhejiang Province, China （Grant No. Q 12A040038）, and the Fundamental Research Funds for the Central Universities of China.
相关项目：d-电子和f-电子材料中的奇异量子物质态研究

关键词：化合物超导体, 反铁磁, 硫族, 高温超导, FEAS, 超导机制, 单晶生长, 硫属化物, Fe-based superconductors, Fe（Te, Se, S） compounds, （T1, K, Rb）FexSe2 compounds

中文摘要：

Iron-chalcogenide compounds with FeSe(Te, S) layers did not attract much attention until the discovery of high-T c superconductivity (SC) in the iron-pnictide compounds at the begining of 2008. Compared with FeAs-based superconductors, iron-chalcogenide superconductors have aroused enormous enthusiasm to study the relationship between SC and magnetisms with several distinct features, such as different antiferromagnetic ground states with relatively large moments in the parents, indicating possibly different superconducting mechanisms, the existence of the excess Fe atoms or Fe vacancies in the crystal lattice. Another reason is that the large single crystals are easily grown for the iron-chalcogenide compounds. This review will focus on our exploration for the iron-chalcogenide superconductors and discussion on several issues, including the crystal structure, magnetic properties, superconductivity, and phase separation. Some of them reach a consensus but some important questions still remain to be answered.

英文摘要：

Iron-chalcogenide compounds with FeSe（Te, S） layers did not attract much attention until the discovery of high-Tc superconductivity （SC） in the iron-pnictide compounds at the begining of 2008. Compared with FeAs-based superconductors, iron-chalcogenide superconductors have aroused enormous enthusiasm to study the relationship between SC and magnetisms with several distinct features, such as different antiferromagnetic ground states with relatively large moments in the parents, indicating possibly different superconducting mechanisms, the existence of the excess Fe atoms or Fe vacancies in the crystal lattice. Another reason is that the large single crystals are easily grown for the iron-chalcogenide compounds. This review will focus on our exploration for the iron-chalcogenide superconductors and discussion on several issues, including the crystal structure, magnetic properties, superconductivity, and phase separation. Some of them reach a consensus but some important questions still remain to be answered.

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