铁基高温超导材料的角分辨光电子能谱研究  

Angle-resolved photoemission spectroscopy study on iron-based superconductors

作　　者：王政国 黄勇 张焱[1] 张鹏[2] 丁洪 WANG ZhengGuo;HUANG Yong;ZHANG Yan;ZHANG Peng;DING Hong(International Center for Quantum Materials,School of Physics,Peking University,Beijing 100871,China;Department of Physics and National Laboratory of Solid State Microstructures,Nanjing University,Nanjing 210093,China;Tsung-Dao Lee Institute,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]北京大学物理学院,量子材料科学中心,北京100871 [2]南京大学物理学院,固体微结构物理国家重点实验室,南京210093 [3]上海交通大学李政道研究所,上海200240

出　　处：《中国科学：物理学、力学、天文学》2023年第6期39-59,共21页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家重点研发计划(编号:2022YFA1403502);国家自然科学基金(编号:12274209)资助项目。

摘　　要：高温超导电性是近代凝聚物理关注的核心问题.高温超导的研究一方面具有重大的应用前景,另一方面推动了多体关联凝聚态物理理论和计算的发展.铁基高温超导材料是除铜氧化物高温超导外的第二类常压条件下的高温超导材料.在对铁基高温超导的研究过程中,研究者利用角分辨光电子能谱技术对铁基高温超导材料的电子结构、对称破缺相、超导能隙等进行了详细的研究,为揭示铁基高温超导配对机制提供了重要的实验依据.近些年,角分辨光电子能谱实验更是在一些铁基高温超导材料中发现了拓扑超导存在的证据.本文将对铁基高温超导材料的角分辨光电子能谱相关工作进行总结.High-Tc superconductivity is one of the central puzzles in modern condensed matter physics,because it not only shows great potential for applications but also the study of high-Tc superconductivity deeply affects our way of thinking about many-body problems and correlations in condensed matter physics.Iron-based superconductors are the second family of high-Tc superconductors discovered at ambient pressure since the discovery of cuprates.Therefore,the discovery of ironbased superconductors attracts great interest.Angle-resolved photoemission spectroscopy(ARPES)is a powerful experimental technique that directly detects the electronic structures of materials.In this review,the ARPES studies of iron-based superconductors on various aspects,including electronic structure,symmetry-breaking states,gap anisotropy,and topological superconductivity,are summarized.We show how these spectroscopic data help us unveil the pairing mechanism and topological characteristic of iron-based superconductors.

关 键 词：角分辨光电子能谱 铁基高温超导 拓扑超导 

分 类 号：O511.3[一般工业技术—材料科学与工程] TB34[理学—低温物理]