Iron-Based Layered Superconductor La[O1-xFx]FeAs (x = 0.05-0.12) with Tc = 26 K

J. Am. Chem. Soc., 130 (11), 3296 -3297, 2008. 10.1021/ja800073m S0002-7863(80)00073-X
Web Release Date: February 23, 2008

Iron-Based Layered Superconductor La[O_1-_xF_x]FeAs (x = 0.05-0.12) with T_c = 26 K

Yoichi Kamihara,* Takumi Watanabe, Masahiro Hirano, and Hideo Hosono

ERATO-SORST, JST, Frontier Research Center, Tokyo Institute of Technology, Mail Box S2-13, Materials and Structures Laboratory, Tokyo Institute of Technology, Mail Box R3-1, and Frontier Research Center, Tokyo Institute of Technology, Mail Box S2-13, 4259 Nagatsuta, Midori-ku, Yokohama 226-8503, Japan

hosono@msl.titech.ac.jp

Received January 9, 2008

Abstract:

We report that a layered iron-based compound LaOFeAs undergoes superconducting transition under doping with F^- ions at the O^2- site. The transition temperature (T_c) exhibits a trapezoid shape dependence on the F^- content, with the highest T_c of ~26 K at ~11 atom %.

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