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Abstract: We investigated the generic phase diagram of the electron dopedsuperconductor, Nd2-xCexCuO4, using films prepared by metal organicdecomposition. After careful oxygen reduction treatment to remove interstitialOap atoms, we found that the Tc increases monotonically from 24 K to 29 K withdecreasing x from 0.15 to 0.00, demonstrating a quite different phase diagramfrom the previous bulk one. The implication of our results is discussed on thebasis of tremendous influence of Oap -impurities- on superconductivity and alsomagnetism in T- cuprates. Then we conclude that our result represents thegeneric phase diagram for oxygen-stoichiometric Nd2-xCexCuO4.



Author: Osamu Matsumoto, Aya Utsuki, Akio Tsukada, Hideki Yamamoto, Takaaki Manabe, Michio Naito

Source: https://arxiv.org/







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