Pnictide superconductors

Since the first report on superconductivity at 26 K in F-doped LaOFeAs in February 2008 [12], the iron pnictide superconductor family has expanded to six different structures, and the superconducting transition temperature has increased to around 57 K... 

Y. Nakai, T. lye, S. Kitagawa, K. Ishida, S. Kasahara, T. Shibauchi, Y. Matsuda, H. Ikeda and T. Terashima, Normal-State Spin Dynamics in the Iron-Pnictide Superconductors BaFe2(ASi.xPx)2 and Ba(Fei.xCOx)2As2 Probed with NMR Measurements, Phys. Rev. B Condens. Matter Mater. Phys., 2013,... 

Newer superconductors are MgB2, a type-II BCS superconductor (TC = 39K) [62], "doped" FeSe (TC<27K) [63], and d-metal pnictide oxide superconductors LaFeAsO0.89F0.11 (TC = 26K) [64], Lao.sYosFeAsOo/,... 

K. Ishida et al. To what extent iron-pnictide new superconductors have been clarified A progress report, ]. Phys. Soc. Jpn. 78 062001 (2009). 

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