New Electron-Doped Superconducting Cuprate Li_x_Sr_2_CuO_2_Br_2_

A new electron-doped superconductor Li_x_Sr_2_CuO_2_Br_2_ with x = 0.15 has successfully been synthesized by an electrochemical Li-intercalation technique. The magnetic susceptibility shows superconductivity of bulk with the superconducting transition temperature Tc = 8 K. This compound is the first electron-doped superconducting cuprate with the K_2_NiF_4_ structure.Comment: 9pages, 3figures, accepted for publication in Jpn. J. Appl. Phy