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Science 21 April 2000:
Vol. 288. no. 5465, pp. 480 - 482
DOI: 10.1126/science.288.5465.480
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Sources of Quantum Protection in High-Tc Superconductivity

Philip W. Anderson

The layer-structure cuprates with high superconducting transition temperatures Tc exhibit a number of anomalous electronic properties in both superconducting and normal states. These anomalies are ascribed to the existence of independent spectra of excitations for charge and for spin, signaling a collective state, a "quantum protectorate."

Joseph Henry Laboratories of Physics, Princeton University, Princeton, NJ 08544, USA. E-mail: pwa{at}pupgg.princeton.edu

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
Pressure Dependence of the Superconducting Transition Temperature of Magnesium Diboride.
M. Monteverde, M. Núñez-Regueiro, N. Rogado, K. A. Regan, M. A. Hayward, T. He, S. M. Loureiro, and R. J. Cava (2001)
Science 292, 75-77
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