关键词: 铁基超导体/
拓扑相变/
拓扑量子态
English Abstract
Research progress of topological quantum states in iron-based superconductor
Hao Ning1,Hu Jiang-Ping2,3
1.Anhui Province Key Laboratory of Condensed Matter Physics at Extreme Conditions, High Magnetic Field Laboratory, Chinese Academy of Sciences, Hefei 230031, China;
2.Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
3.Kavli Institute of Theoretical Sciences, University of Chinese Academy of Sciences, Beijing 100190, China
Fund Project:Project supported by the National Key Research and Development Plan of China (Grant Nos. 2015CB921300, 2017YFA0303100, 2017YFA0303201), the National Natural Science Foundation of China (Grant Nos. 11674331, 11334012), the 100 Talents Project of Chinese Academy of Sciences, and the Strategic Priority Research Program of Chinese Academy of Sciences (Grant No. XDB07000000).Received Date:30 July 2018
Accepted Date:21 August 2018
Published Online:20 October 2019
Abstract:Iron-based superconductors and topological quantum states have been two important research frontiers in condensed matter physics in recent years. It is a very significant question whether the nontrivial topological phenomena can occur in iron-based superconductors. In this paper, the basic characteristics of the electronic structure of iron-based superconducting are analyzed from three aspects:crystal symmetry, effective model near the high symmetry points in Brillouin zone, and spin-orbit coupling interaction. On this basis, this paper focuses on how the nontrivial topological quantum states occur in the normal state, the states with long-range order near superconducting state and the superconducting state. Furthermore, the relevant theoretical models and results are introduced in detail, the related experimental progress is reviewed, and the development in this field is prospected.
Keywords: iron-based superconductor/
topological phase transition/
topological quantum state
