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arXiv · 1012.5188

Revised Phase Diagram for FeTe1-xSex system with less excess Fe atoms

Chihen Dong·Hangdong Wang·Zujuan Li·Jian Chen·H. Q. Yuan·Minghu Fang
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Abstract

We observed bulk superconductivity in the FeTe1-xSex crystals with a low Se concentration after the excess Fe atoms existing unavoidably in crystals as-grown are partially removed by means of annealing in the air. A revised magnetism and superconductivity phase diagram is obtained via resistivity and magnetic susceptibility measurements for FeTe1-xSex system. It is found that bulk superconductivity coexists with antiferromagnetic order in the crystals with 0.05<x<0.20. The phase diagram is very similar to the case of the K-doping or Co-doping BaFe2As2, as well as of SmFeAsO1-xFx iron-pnictide system, perhaps indicating that all iron-based systems have a generic phase diagram, although antiferromagnetic wave vector in the parent compounds of these systems is remarkable different.

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Chihen Dong, Hangdong Wang, Zujuan Li, Jian Chen, H. Q. Yuan, Minghu Fang. 2010-12-23. Revised Phase Diagram for FeTe1-xSex system with less excess Fe atoms. https://doi.org/10.1103/physrevb.84.224506

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