Thorium-doping-induced superconductivity up to 56 K in Gd1-xThxFeAsO

Authors

Cao Wang, Zhejiang UniversityFollow
Linjun Li, Zhejiang University
S Chi, Zhejiang University
Zeng-Wei Zhu, Zhejiang University
Zhi Ren, Zhejiang University
Yuke Li, Zhejiang University
Y T. Wang, Zhejiang University
Xiao Lin, Zhejiang University
Yongkang Luo, Zhejiang University
Shuai Jiang, Zhejiang University
Xiangfan Xu, Zhejiang University
Guanghan Cao, Zhejiang University
Zhu-An Xu, Zhejiang University

RIS ID

70090

Publication Details

Wang, C., Li, L., Chi, S., Zhu, Z., Ren, Z., Li, Y., Wang, Y. T., Lin, X., Luo, Y., Jiang, S., Xu, X., Cao, G. & Xu, Z. (2008). Thorium-doping-induced superconductivity up to 56 K in Gd1-xThxFeAsO. Europhysics Letters: a letters journal exploring the frontiers of physics, 83 (6), 67006-p1-67006-p4.

Abstract

We report a new strategy to induce superconductivity in iron-based oxyarsenide. Instead of F - substitution for O 2-, we employed Th 4+ doping in GdFeAsO with the consideration of "lattice match" between Gd 2O 2 layers and Fe 2As 2 ones. As a result, superconductivity with T c onset as high as 56 K was realized in a Gd 0.8Th 0.2FeAsO polycrystalline sample. This T c value is among the highest ever discovered in the iron-based oxypnictides.