Superconductivity in iron compounds
Superconductivity in iron compounds
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DOI：
10.1103/revmodphys.83.1589
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发表时间：
2011-12-13
影响因子：
44.1
通讯作者：
Stewart, G. R.
中科院分区：
文献类型：
--
作者：
Stewart, G. R.
Kamihara 及其同事关于掺氟 LaFeAsO 在 T-c = 26 K 时超导性的报告激发了全世界人们努力了解这类新型化合物的超导性本质。这些铁磷族化物和硫族化物 (FePn/Ch) 超导体在费米表面具有 Fe 电子，加上不寻常的费米学，可以随着掺杂而快速变化，这导致正常和超导状态特性与标准电子声子耦合的“传统”超导体非常不同。显然，超导性和磁性或磁涨落在 FePn/Ch 中密切相关，甚至在某些 FePn/Ch 中共存。悬而未决的问题（包括许多化合物中的超导节点结构）比比皆是，并且通常取决于解决方案的样品质量的提高。六种不同的含铁超导结构的 T-c 值高达 56 K，表现出复杂但通常具有可比性的行为。在这个令人着迷的研究领域中寻找相关性和解释将受益于对看似不同的大型数据集的组织。本综述使用大量参考文献提供了概述，重点关注材料及其超导性。
Kamihara and coworkers' report of superconductivity at T-c = 26 K in fluorine-doped LaFeAsO inspired a worldwide effort to understand the nature of the superconductivity in this new class of compounds. These iron pnictide and chalcogenide (FePn/Ch) superconductors have Fe electrons at the Fermi surface, plus an unusual Fermiology that can change rapidly with doping, which lead to normal and superconducting state properties very different from those in standard electron-phonon coupled "conventional" superconductors. Clearly, superconductivity and magnetism or magnetic fluctuations are intimately related in the FePn/Ch, and even coexist in some. Open questions, including the superconducting nodal structure in a number of compounds, abound and are often dependent on improved sample quality for their solution. With T-c values up to 56 K, the six distinct Fe-containing superconducting structures exhibit complex but often comparable behaviors. The search for correlations and explanations in this fascinating field of research would benefit from an organization of the large, seemingly disparate data set. This review provides an overview, using numerous references, with a focus on the materials and their superconductivity.