红外光谱在铁基超导材料研究中的应用  

Applications of infrared spectroscopy in the study of iron-based superconductors

作　　者：戴耀民 Dai Yao-Min(Center for Superconducting Physics and Materials,National Laboratory of Solid State Microstructures and Department of Physics,Nanjing University,Nanfing 210093,China)

机构地区：[1]超导物理与材料研究中心,固体微结构国家实验室,南京大学物理学院

出　　处：《物理学进展》2018年第4期147-162,共16页Progress In Physics

摘　　要：红外光谱作为一种体测量手段在非常规超导材料的研究中占有非常重要的地位。本文介绍傅立叶变换红外光谱的基本原理，用来测量固体材料绝对反射率的原位镀膜技术，数据分析中常用的方法和理论模型，以及如何利用该技术手段观测和研究铁基超导材料中的超导能隙，电子配对对称性，自旋密度波能隙，非费米液体行为，晶格振动模式，以及不同相之间的相互关系和不同激发之间的相互作用等超导研究中的重要问题。Infrared spectroscopy, as a bulk-sensitive technique, plays an important role in the study of uncon- ventional superconducting materials. In this article, I will introduce the fundamentals of Fourier transform infrared spectroscopy, the in situ gold evaporation technique used to accurately mea-sure the absolute reflectivity of solid materials, the methods and models we used for optical data analysis, and how we can use infrared spectroscopy to investigate the important and fascinating quantum phenomena in iron-based superconductors, such as the superconducting gaps, electronic pairing symmetry, spin-density-wave gaps, non-Fermi liquid behavior, lattice vibrations, as well as the relation and interaction between different orders and excitations.

关 键 词：铁基超导体 红外光谱 超导能隙 自旋密度波 非费米液体 声子 

分 类 号：O469[理学—凝聚态物理]