Generic phase diagram of Nd2−xCexCuO4

✍ Scribed by O. Matsumoto; A. Tsukada; H. Yamamoto; T. Manabe; M. Naito

• Publisher: Elsevier Science
• Year: 2010
• Tongue: English
• Weight: 288 KB
• Volume: 470
• Category: Article
• ISSN: 0921-4534
• DOI: 10.1016/j.physc.2009.11.108

✦ Synopsis

High-T c superconductivity Electronic phase diagram Parent compound superconductor Nd 2 CuO 4 structure Apical oxygen a b s t r a c t

We investigated the generic phase diagram of the electron doped superconductor, Nd 2Àx Ce x CuO 4 , using films prepared by metal organic decomposition. After careful oxygen reduction treatment to remove interstitial O ap atoms, we found that the T c increases monotonically from 24 K to 29 K with decreasing x from 0.15 to 0.00, demonstrating a quite different phase diagram from the previous bulk one. Based on the discussion on the tremendous influence of O ap ''impurities" on superconductivity in T 0 cuprates, we conclude that our result represents the generic phase diagram for oxygen-stoichiometric Nd 2Àx Ce x CuO 4 .