关键词: 111型铁基超导体/
LiFeAs/
LiFeP/
NaFeAs
English Abstract
Research progress about 111-typed iron based superconductor
Wang Xian-Cheng1,Jin Chang-Qing1,2
1.Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, Beijing 100190, China;
2.School of Physical Sciences, University of Chinese Academy of Sciences, Beijing 100049, China
Fund Project:Project supported by financially supported by the National Natural Science Foundation of China(Grant No. 11474344) and the National Key Research and Development Plan of China (Grant Nos. 2018YFA0305700, 2017YFA0302900).Received Date:23 August 2018
Accepted Date:11 October 2018
Published Online:20 October 2019
Abstract:111-typed iron based superconductors have three members: LiFeAs, NaFeAs and LiFeP. The family of LiFeAs itself does not show any long range magnetic order but become superconductor without chemical doping. NaFeAs displays the separation of structural and magnetic transition, suitable to investigate the origin of the two transitions. LiFeP has been proved to be a nodal superconductor. The structure of 111 compounds consists of[FeAs/P] layers intercalated with two alkali metal layers, which makes single crystals easy to be cleaved into two equal counterparts with non-polar surface and thus is favored by the surface characterization techniques, such as the research of angleresolved photoemission experiment and scanning tunneling microscope measurement. Up to now, fruitful results have been achieved about the study of 111 family. In this paper, we summarize recent progresses on this family.
Keywords: 111-typed iron based superconductor/
LiFeAs/
LiFeP/
NaFeAs
