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Nature 430, 512-513 (29 July 2004) | doi:10.1038/430512a; Published online 28 July 2004

Superconductivity:  Why the temperature is high

Jan Zaanen1

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According to a new empirical law, the transition temperature to superconductivity is high in copper oxides because their metallic states are as viscous as is permitted by the laws of quantum physics.

Dissipation is obvious in the human environment. The phenomenon describes how useful energy is eventually converted into microscopic disorder, which is perceived by us as a rise in temperature.

  1. Jan Zaanen is at the Instituut Lorentz for Theoretical Physics, Leiden University, PO Box 9504, 2300 RA Leiden, The Netherlands.
    e-mail: Email: jan@lorentz.leidenuniv.nl

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