非常规超导体的中子散射研究

Neutron scattering studies on unconventional superconductors

非常规超导机理仍然是一个未解之谜,它是凝聚态物理研究的重要课题。非常规超导电性大多发生在磁不稳态附近,所以确定非常规超导体的磁结构和磁激发行为对理解其超导机制非常关键。中子带有磁矩,是探测超导体磁性的有力工具。文章将以本课题组近年来开展的工作为例,介绍几种中子散射技术在研究非常规超导体的晶体结构和磁关联行为以及超导配对对称性方面的应用。

The mechanism of unconventional superconductivity,an important topic in the study of condensed matter physics,remains a mystery.Unconventional superconductivity often occurs near magnetic instabilities,therefore the elucidation of the magnetic structure and magnetic excitations of an unconventional superconductor is critical to understanding its pairing mechanism.The neutron’s magnetic moment is ideally suited for detecting the magnetic properties of unconventional superconductors.In this paper we will introduce the application of various neutron scattering techniques in the study of the crystal structure,magnetic correlation and pairing symmetry of unconventional superconductors.