Superconductivity in S-substituted FeTe

Mizuguchi, Yoshikazu; Tomioka, Fumiaki; Tsuda, Shunsuke; Yamaguchi, Takahide; Takano, Yoshihiko
January 2009
Applied Physics Letters;1/5/2009, Vol. 94 Issue 1, p012503
Academic Journal
We synthesized a superconducting system of FeTe1-xSx with a PbO-type structure. It has the simplest crystal structure among iron-based superconductors. The superconducting transition temperature is about 10 K when x is 0.2. The upper critical field Bc2(0) was estimated to be ~70 T. The coherent length was calculated to be ~2.2 nm. Since FeTe1-xSx is composed of nontoxic elements, this material is a candidate for applications that will further advance research on iron-based superconductors.


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