Exploration of iron-chalcogenide superconductors  

作　　者：董持衡 王杭栋 方明虎 

机构地区：[1]Department of Physics, Zhejiang University [2]Department of Physics, Hangzhou Normal University

出　　处：《Chinese Physics B》2013年第8期63-74,共12页中国物理B（英文版）

基　　金：supported by the National Basic Research Program of China(Grant Nos.2011CBA00103,2012CB821404,and 2009CB929104);the National Natural Science Foundation of China(Grant Nos.10974175,10934005,and 11204059);the Natural Science Foundation of Zhejiang Province,China(Grant No.Q12A040038);the Fundamental Research Funds for the Central Universities of China

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.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.

关 键 词：Fe-based superconductors Fe（Te Se S） compounds （T1 K Rb）FexSe2 compounds 

分 类 号：TM26[一般工业技术—材料科学与工程]