Microscopic annealing process and its impact on superconductivity in T'-structure electron-doped copper oxides

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dc.creatorKang, Hye Jung
dc.creatorDai, Pengcheng
dc.creatorCampbell, Branton J.
dc.creatorChupas, Peter J.
dc.creatorRosenkranz, Stephan
dc.creatorLee, Peter L.
dc.creatorHuang, Qingzhen
dc.creatorLi, Shiliang
dc.creatorKomiya, Seiki
dc.creatorAndo, Yoichi
dc.date2007-01-15
dc.date.accessioned2026-07-07T07:49:17Z
dc.date.available2026-07-07T07:49:17Z
dc.descriptionHigh-transition-temperature superconductivity arises in copper oxides when holes or electrons are doped into the CuO2 planes of their insulating parent compounds. While hole-doping quickly induces metallic behavior and superconductivity in many cuprates, electron-doping alone is insufficient in materials such as R2CuO4 (R is Nd, Pr, La, Ce, etc.), where it is necessary to anneal an as-grown sample in a low-oxygen environment to remove a tiny amount of oxygen in order to induce superconductivity. Here we show that the microscopic process of oxygen reduction repairs Cu deficiencies in the as-grown materials and creates oxygen vacancies in the stoichiometric CuO2 planes, effectively reducing disorder and providing itinerant carriers for superconductivity. The resolution of this long-standing materials issue suggests that the fundamental mechanism for superconductivity is the same for electron- and hole-doped copper oxides.
dc.description23 pages, 3 figures, accepted for publication in Nature Materials
dc.identifierhttps://arxiv.org/abs/cond-mat/0701345
dc.identifierhttp://arxiv.org/abs/cond-mat/0701345
dc.identifierNature Mater, 6, 224-229 (2007)
dc.identifierdoi:10.1038/nmat1847
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/124788
dc.subjectSuperconductivity
dc.subjectStrongly Correlated Electrons
dc.titleMicroscopic annealing process and its impact on superconductivity in T'-structure electron-doped copper oxides
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