Exploration of iron-chalcogenide superconductors |
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| Authors: | Dong Chi-Heng Wang Hang-Dong and Fang Ming-Hu |
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| Affiliation: | [1]Department of Physics, Zhejiang University, Hangzhou 310027, China [2]Department of Physics, Hangzhou Normal University, Hangzhou 310016, China |
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| Abstract: | 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. |
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| Keywords: | Fe-based superconductors Fe（Te Se S） compounds （T1 K Rb）FexSe2 compounds |
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