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Physicists Get the Dope on Disorder in High-Temperature Superconductors

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Science  12 Aug 2005:
Vol. 309, Issue 5737, pp. 1001
DOI: 10.1126/science.309.5737.1001a

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Measurements reported on page 1048 of this issue of Science reveal the source of much of the disorder within high-temperature superconductors: It's caused by oxygen "dopant" atoms strewn throughout the layered crystals--the same atoms that supply electric charges for the superconducting currents.