Antiferromagnetic order and spin dynamics in iron-based superconductors
Antiferromagnetic order and spin dynamics in iron-based superconductors
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DOI：
10.1103/revmodphys.87.855
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发表时间：
2015-08-20
影响因子：
44.1
通讯作者：
Dai, Pengcheng
中科院分区：
文献类型：
--
作者：
Dai, Pengcheng
铁磷族化物或硫族化物中的高转变温度（高T-c）超导性是由于其母体化合物中静态反铁磁序的抑制而产生的，类似于氧化铜超导体。这就提出了一个关于磁性在这些材料的超导性中的作用的基本问题。中子散射是研究磁序和自旋动力学的有力探针，在确定高温超导体中磁性和超导性之间的关系方面发挥着重要作用。现代中子飞行时间光谱仪的快速发展可以直接测定整个布里渊区铁基超导体的自旋动力学特性。本文概述了铁基超导体上的中子散射结果，重点关注自旋激发光谱随电子和空穴掺杂以及等电子取代的变化。将铁基超导体的自旋动力学性质与氧化铜和重费米子超导体的自旋动力学性质进行了比较，讨论了这三类非常规超导体自旋激发的共同特征及其与超导性的关系。
High-transition temperature (high-T-c) superconductivity in the iron pnictides or chalcogenides emerges from the suppression of the static antiferromagnetic order in their parent compounds, similar to copper oxide superconductors. This raises a fundamental question concerning the role of magnetism in the superconductivity of these materials. Neutron scattering, a powerful probe to study the magnetic order and spin dynamics, plays an essential role in determining the relationship between magnetism and superconductivity in high-T-c superconductors. The rapid development of modern neutron time-of-flight spectrometers allows a direct determination of the spin dynamical properties of iron-based superconductors throughout the entire Brillouin zone. In this paper, an overview is presented of the neutron scattering results on iron-based superconductors, focusing on the evolution of spin-excitation spectra as a function of electron and hole doping and isoelectronic substitution. Spin dynamical properties of iron-based superconductors are compared with those of copper oxide and heavy fermion superconductors and the common features of spin excitations in these three families of unconventional superconductors and their relationship with superconductivity are discussed.