关键词: 高温超导/
角分辨光电子能谱/
电子结构/
超导机理
English Abstract
Angle-resolved photoemission studies on iron based high temperature superconductors
Zhao Lin1,2,Liu Guo-Dong1,2,
Zhou Xing-Jiang1,2,3
1.National Lab for Superconductivity, Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2.University of Chinese Academy of Sciences, Beijing 100049, China;
3.Collaborative Innovation Center of Quantum Matter, Beijing 100871 China
Fund Project:Project supported by the National Basic Research Program of China (Grant Nos. 2016YFA0300300, 2015CB921000), the National Natural Science Foundation of China (Grant No. 11334010), the Strategic Priority Research Program (B) of Chinese Academy of Sciences (Grant Nos. XDB07020300, XDB25000000), and the Youth Innovation Promotion Association of Chinese Academy of Sciences (Grant No. 2017013).Received Date:26 September 2018
Accepted Date:10 October 2018
Published Online:20 October 2019
Abstract:Copper oxide superconductors and iron-based superconductors are two important families of high temperature superconductors. Their high-temperature superconductivity mechanism is a long-standing issue and still in hot debate in the field of condensed matter physics. The extensive and in-depth exploration of iron-based superconductors and their comparative study with copper oxide high-temperature superconductors are of great significance for the development of new quantum theory, the solution of high-temperature superconducting mechanism, the exploration of new superconductors and practical applications of superconductors. The macroscopic properties of materials are determined by their microscopic electronic structure. Revealing the microscopic electronic structure of high temperature superconductors is fundamental for understanding high temperature superconductivity. Angle-resolved photoelectron spectroscopy, due to its unique simultaneous energy, momentum and even spin resolving ability, has become the most direct and powerful experimental tool for detecting the microscopic electronic structure of materials, and has played an important role in the study of iron-based high-temperature superconductors. The revealing and discovery of the Fermi surface topology, superconducting energy gap and its symmetry, three-dimensionality, orbital selectivity, and electronic coupling mode in different iron-based superconductor systems provide an important basis for identifying and proposing new theory of iron-based superconductivity to solve high temperature superconductivity mechanism.
Keywords: high temperature superconductivity/
angle-resolved photoemission spectroscopy/
electronic structure/
superconductivity mechanism
