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Why the temperature is high

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.

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Figure 1: Planckian dissipation and high transition temperatures.


  1. Bednorz, J. G. & Müller, K. A. Z. Phys. B 64, 189–193 (1986).

    Article  ADS  CAS  Google Scholar 

  2. Orenstein, J. & Millis, A. J. Science 288, 468–474 (2000).

    Article  ADS  CAS  Google Scholar 

  3. Homes, C. C. et al. Nature 430, 539–541 (2004).

    Article  ADS  CAS  Google Scholar 

  4. Uemura, Y. J. et al. Phys. Rev. Lett. 62, 2317–2320 (1989).

    Article  ADS  CAS  Google Scholar 

  5. Emery, V. J. & Kivelson, S. A. Nature 374, 434–437 (1995).

    Article  ADS  CAS  Google Scholar 

  6. Tinkham, M. & Ferrel, R. A. Phys. Rev. Lett. 2, 331–333 (1959).

    Article  ADS  Google Scholar 

  7. Ambegoakar, V. & Baratoff, A. Phys. Rev. Lett. 10, 486–489 (1963).

    Article  ADS  Google Scholar 

  8. Tanner, D. B. et al. Physica B 244, 1–8 (1998).

    Article  ADS  CAS  Google Scholar 

  9. Sachdev, S. Quantum Phase Transitions (Cambridge Univ. Press, 1999).

    MATH  Google Scholar 

  10. van der Marel, D. et al. Nature 425, 271–274 (2003).

    Article  ADS  CAS  Google Scholar 

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Zaanen, J. Why the temperature is high. Nature 430, 512–513 (2004).

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