Exploration of iron-chalcogenide superconductors
Exploration of iron-chalcogenide superconductors
复制标题
铁硫族化物超导体的探索
DOI：
10.1088/1674-1056/22/8/087401
复制
发表时间：
2013-07
影响因子：
1.7
通讯作者：
Fang MH
中科院分区：
文献类型：
--
作者：
Dong CH;Wang HD;Fang MH
具有FeSe（Te，S）层的铁硫族化合物直到2008年初在铁磷族化合物中发现高Tc超导性（SC）才引起人们的关注。与FeAs基超导体相比，铁硫系超导体具有几个显著的特点，如不同的反铁磁基态和相对较大的磁矩，表明可能存在不同的超导机制，晶格中存在多余的Fe原子或Fe空位，从而引起了人们对超导与磁性关系的极大兴趣。另一个原因是铁硫族化合物的大单晶容易生长。本文将着重介绍我们对铁硫系超导体的探索，并讨论几个问题，包括晶体结构，磁性，超导性和相分离。其中一些人达成了共识，但一些重要问题仍有待回答。
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.