铜氧化物高温超导体电子结构和超导机理的角分辨光电子能谱研究  

Angle-resolved photoemission studies of the electronic structure and superconductivity of high-temperature cuprate superconductors

作　　者：殷超辉 陈逸雯 闫宏涛 赵林 周兴江[1,2,3,4] YIN Chao-Hui;CHEN Yi-Wen;YAN Hong-Tao;ZHAO Lin;&ZHOU Xing-Jiang(National Lab for Superconductivity,Institute of Physics,Chinese Academy of Sciences,Beijing 100190,China;School of Physical Sciences,University of Chinese Academy of Sciences,Beijing 100049,China;Beijing Academy of Quantum Information Sciences,Beijing 100193,China;Songshan Lake Materials Laboratory,Dongguan 523808,China)

机构地区：[1]中国科学院物理研究所,超导国家重点实验室,北京100190 [2]中国科学院大学物理科学学院,北京100049 [3]北京量子信息科学研究院,北京100193 [4]松山湖材料实验室,东莞523808

出　　处：《中国科学：物理学、力学、天文学》2023年第6期20-38,共19页Scientia Sinica Physica,Mechanica & Astronomica

基　　金：国家自然科学基金(编号:11888101,11922414);国家重点基础研究发展计划(编号:2021YFA1401800)资助项目。

摘　　要：与单质金属或者合金为代表的常规超导体不同,以铜氧化合物高温超导体为代表的非常规超导体的超导机理超出了BCS理论的解释范畴,已经成为凝聚态物理领域的重大科学问题.角分辨光电子能谱技术以其独特的电子能量/动量分辨的优势,在铜氧化物高温超导体的能带结构、能隙行为、多体相互作用等相关物理和超导机理的研究方面发挥着重要作用.角分辨光电子能谱实验技术的提高和数据分析方法的发展,不仅丰富了铜氧化物超导体的电子相图,并且不断加深了人们对其内在物理本质的认知.本文总结了近年来角分辨光电子能谱技术的最新进展,并集中讨论了其在铜氧化物高温超导体研究中对能带结构演化、超导能隙行为和电子-声子相互作用等方面取得的最新研究进展,最后介绍了使用Eliashberg函数数值分析研究高温超导体超导机理的方法.In contrast to conventional superconductors,such as elemental metals or alloys,the superconductivity mechanism of unconventional superconductors,such as high-temperature cuprate superconductors,is challenging the Bardeen-CooperSchrieffer theory of superconductivity and has become a significant issue in condensed matter physics.With its unique advantages in energy/momentum-resolving capabilities,angle-resolved photoemission spectroscopy(ARPES)has played an important role in understanding the electronic structure and superconductivity mechanism of high-temperature cuprate superconductors,including studies of band structures,energy gaps,and many-body interactions.With the dramatic improvement of the ARPES technique and the development of the data analysis method,the electronic phase diagram of cuprate superconductors has been updated,and the understanding of its underlying physical origin has been enriched.In this study,we first introduce the development of the ARPES technique and then focus on the latest progress in the doping evolution of the band structure,precise determination of the energy gap,and ubiquitous electron-phonon interactions in cuprate superconductors.Finally,we present a procedure for investigating the pairing mechanism of high-temperature superconductors by quantitative extraction of the normal and pairing Eliashberg functions.

关 键 词：铜氧化物超导体 角分辨光电子能谱仪 电子结构 超导机理 

分 类 号：O511.3[一般工业技术—材料科学与工程]