30 August 2005 Complexity in transition metal oxides
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The competition of antiferromagnetic and d-wave superconductivity order parameters in cuprates is studied within a phenomenological model. An unbiased numerical analysis is carried out. The results suggest that the transition from the antiferromagnetic to the superconducting region is not universal. When disorder is present, a glassy state forms leading to the possibility of "colossal" effects in some cuprates, analog of those in other transition metal oxides, in particular manganites. Non-superconducting Cu-oxides could rapidly become superconducting by the influence of weak perturbations. Consequences of this mechanism for thin-film and angle-resolved photoemission experiments are discussed. In addition, a recent study of the strong-coupling region in d-wave superconductors with a numerically exact technique is briefly reviewed.
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Gonzalo Alvarez, Gonzalo Alvarez, Adriana Moreo, Adriana Moreo, Elbio Dagotto, Elbio Dagotto, } "Complexity in transition metal oxides", Proc. SPIE 5932, Strongly Correlated Electron Materials: Physics and Nanoengineering, 59320F (30 August 2005); doi: 10.1117/12.624870; https://doi.org/10.1117/12.624870

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