1. Kamihara, Y., Watanabe, T., Hirano, M., Hosono, H.: Iron-based layered superconductor La[O1-xFx]FeAs (x = 0.05−0.12) with Tc = 26 K. J. Am. Chem. Soc. 130, 3296 (2008)
2. Tapp, J.H., Tang, Z., Lv, B., Sasmal, K., Lorenz, B., Chu, P.C.W., Guloy, A.M.: LiFeAs: an intrinsic FeAs-based superconductor withTc=18 K. Phys. Rev. B. 78, 060505 (2008)
3. Rotter, M., Tegel, M., Johrendt, D.: Superconductivity at 38 K in the iron arsenide (Ba1-xKx)Fe2As2. Phys. Rev. Lett. 101(107006), (2008)
4. Sasmal, K., Lv, B., Lorenz, B., Guloy, A.M., Chen, F., Xue, Y.Y., Chu, C.W.: Superconducting Fe-based compounds (A1-xSrx)Fe2As2 with A= K and Cs with transition temperatures up to 37 K. Phys. Rev. Lett. 101(107007), (2008)
5. Hsu, F.C., Luo, J.Y., Yeh, K.W., Chen, T.K., Huang, T.W., Wu, P.M., Lee, Y.C., Huang, Y.L., Chu, Y.Y., Yan, D.C., Wu, M.K.: Superconductivity in the PbO-type structure alpha-FeSe. Proc. Natl. Acad. Sci. U. S. A. 105, 14262 (2008)