The response of the worldwide scientific community to the discovery in 2008 of superconductivity at T c = 26 K in the Fe-based compound LaFeAsO1−x F x has been very enthusiastic. In short order, other Fe-based superconductors with the same or related crystal structures were discovered with T c up to 56 K. Many experiments were carried out and theories formulated to try to understand the basic properties of these new materials and the mechanism for T c. In this selective critical review of the experimental literature, we distill some of this extensive body of work, and discuss relationships between different types of experiments on these materials with reference to theoretical concepts and models. The experimental normal-state properties are emphasized, and within these the electronic and magnetic properties because of the likelihood of an electronic/magnetic mechanism for superconductivity in these materials.

中文翻译：

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层状铁元素和硫属元素的高温超导之谜

2008 年，世界科学界对 Fe 基化合物 LaFeAsO1-x F x 中 T c = 26 K 的超导性发现的反应非常热烈。很快，其他具有相同或相关晶体结构的铁基超导体被发现，其 T c 高达 56 K。进行了许多实验并制定了理论，试图了解这些新材料的基本性质和 Tc 的机制C。在对实验文献的选择性批判性评论中，我们提炼了一些广泛的工作，并参考理论概念和模型讨论了对这些材料的不同类型实验之间的关系。强调实验常态特性，