Generic phase diagram of "electron-doped" T' cuprates

Abstract

We investigated the generic phase diagram of the electron doped superconductor, Nd2-xCexCuO4, using films prepared by metal organic decomposition. After careful oxygen reduction treatment to remove interstitial Oap atoms, we found that the Tc 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. The implication of our results is discussed on the basis of tremendous influence of Oap "impurities" on superconductivity and also magnetism in T' cuprates. Then we conclude that our result represents the generic phase diagram for oxygen-stoichiometric Nd2-xCexCuO4.

arXiv comment12 pages, 4 figures; International Symposium on Superconductivity (ISS) 2008

References in corpus (8)

• New class of T-prime-structure cuprate superconductors
• Magnetic and superconducting phase diagram of electron-doped Pr${}_{1-x}$LaCe${}_x$CuO${}_4$
• Superconductivity phase diagrams of electron doped cuprates R(2-x)CexCuO4 (R = La, Pr, Nd, Sm, and Eu)
• Kondo effect in underdoped n-type superconductors
• Superconductivity in undoped T' cuprates with Tc over 30 K
• Superconductivity in undoped T'-RE2CuO4 with Tc over 30 K
• Role of impurity oxygen in superconductivity of "non-doped" T'-(La,RE)2CuO4
• Destruction of Neel order and appearance of superconductivity in electron-doped cuprates by oxygen annealing process

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• Band-Renormalization Effects and Predominant Antiferromagnetic Order in Two-Dimensional Hubbard Model
• Unified description of cuprate superconductors using four-band $d$-$p$ model
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