关键词: 铁基超导体/
1111体系/
CaFeAsF/
单晶生长
English Abstract
Single crystal growth and physical property study of 1111-type Fe-based superconducting system CaFeAsF
Mu Gang1,2,Ma Yong-Hui1,2,3
1.State Key Laboratory of Functional Materials for Informatics, Shanghai Institute of Microsystem and Information Technology, Chinese Academy of Sciences, Shanghai 200050, China;
2.CAS Center for Excellence in Superconducting Electronics(CENSE), Shanghai 200050, China;
3.University of Chinese Academy of Sciences, Beijing 100049, China
Fund Project:Project supported by the Youth Innovation Promotion Association of Chinese Academy of Sciences (Grant No. 2015187) and the National Natural Science Foundation of China (Grant No. 11204338).Received Date:16 July 2018
Accepted Date:13 August 2018
Published Online:05 September 2018
Abstract:Since Fe-based high temperature superconductor was discovered in 2008, its material exploration and physical properties have been widely and in depth studied. However, the 1111 system, which was discovered first to have the highest Tc in the bulk material, has long been lacking in large-size and high-quality single-crystalline sample. This seriously restricts the in-depth study of the physical problems relating to this material system. In recent years, the great progress of single crystal growth of the fluorine-based 1111 system CaFeAsF has been made. One has successfully grown the high-quality CaFeAsF parent phase and Co doped superconducting single crystal with millimeter size at ambient pressure by using CaAs as the flux. On this basis, several research groups have studied the physical properties of this system by different experimental means and obtained some important results. For example, Dirac Fermions have been detected in CaFeAsF single crystal by measuring the quantum oscillation and optical conductivity. A high-field-induced metal-insulator transition was reported in CaFeAsF, which is closely related to the quantum limit. This review is intended to make a preliminary summary of the progress of this area, including crystal growth, quantum oscillation, infrared spectrum, magnetoresistance under strong field, high pressure regulation, anisotropy, superconducting fluctuations, etc.
Keywords: Fe-based superconductors/
1111 system/
CaFeAsF/
single crystal growth
