Superconductivity and transport properties in Th and F codoped Sm1-xThxFeAsO1-yFy

Authors

Yuke Li, Zhejiang University
Xiao Lin, Zhejiang University
Qian Tao, Zhejiang University
Hang Chen, Zhejiang University
Cao Wang, Zhejiang UniversityFollow
Linjun Li, Zhejiang University
Yongkang Luo, Zhejiang University
M He, Zhejiang University
Zeng-Wei Zhu, Zhejiang University
Guanghan Cao, Zhejiang University
Zhu-An Xu, Zhejiang University

RIS ID

70012

Publication Details

Li, Y., Lin, X., Tao, Q., Chen, H., Wang, C., Li, L., Luo, Y., He, M., Zhu, Z., Cao, G. & Xu, Z. (2009). Superconductivity and transport properties in Th and F codoped Sm1-xThxFeAsO1-yFy. Chinese Physics Letters, 26 (1), 017402-1-017402-4.

Abstract

A series of Th and F co-doped superconductors Sm1–xThxFeAsO1–yFy are synthesized and the variation of superconductivity with the doping level is investigated. At the fixed Th doping level x = 0.1, the superconducting transition temperature Tc increases monotonically with F content, and finally Tc reaches a maximum of about 55K around y = 0.1, and saturates for even more F content (y = 0.15). Similar to the SmFeAsO1–yFy system, the normal state thermopower increases monotonically with the doping level. However the decrease of Tc in the 'overdoped' regime is not observed and possible explanation is discussed.