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Enhancement of the superconducting critical temperature in Bi$$_2$$Sr$$_2$$CaCu$$_2$$O$$_{8+delta}$$ by controlling disorder outside CuO$$_2$$ planes

Hobo, Hiroaki*; Ishida, Shigeyuki*; Fujita, Kazuhiro*; Ishikado, Motoyuki; Kojima, Kenji*; Eisaki, Hiroshi*; Uchida, Shinichi*

We investigate the effect of disorder at various lattice sites outside the CuO$$_{2}$$ plane on the superconducting critical temperature $$T$$$$_{rm c}$$ of the cuprate superconductor Bi$$_2$$Sr$$_2$$CaCu$$_2$$O$$_{8+delta}$$ (Bi2212). The most effective disorder turns out to be that at the Sr site in the neighboring blocks, which contain apical-oxygen atoms.

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Category:Materials Science, Multidisciplinary

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