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Science 28 June 2002:
Vol. 296. no. 5577, pp. 2364 - 2366
DOI: 10.1126/science.1071122
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Reports

Strongly Correlated Superconductivity

M. Capone,1* M. Fabrizio,23 C. Castellani,1 E. Tosatti23

High-temperature superconductivity in doped Mott insulators such as the cuprates contradicts the conventional wisdom that electron repulsion is detrimental to superconductivity. Because doped fullerene conductors are also strongly correlated, the recent discovery of high-critical-temperature, presumably s-wave, superconductivity in C60 field effect devices is even more puzzling. We examine a dynamical mean-field solution of a model for electron-doped fullerenes that shows how strong correlations can indeed enhance superconductivity close to the Mott transition. We argue that the mechanism responsible for this enhancement could be common to a wider class of strongly correlated models, including those for cuprate superconductors.

1 Istituto Nazionale per la Fisica della Materia (INFM) Center for Statistical Mechanics and Complexity and Physics Department University of Rome "La Sapienza" Piazzale A. Moro, 2, I-00185, Rome, Italy.
2 International School for Advanced Studies (SISSA-ISAS) and INFM, Trieste-SISSA, Via Beirut 2-4, I-34014, Trieste, Italy.
3 International Center for Theoretical Physics (ICTP), Post Office Box 586, I-34014 Trieste, Italy.
*   To whom correspondence should be addressed. E-mail: massimo.capone{at}roma1.infn.it

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THIS ARTICLE HAS BEEN CITED BY OTHER ARTICLES:
The Disorder-Free Non-BCS Superconductor Cs3C60 Emerges from an Antiferromagnetic Insulator Parent State.
Y. Takabayashi, A. Y. Ganin, P. Jeglic, D. Arcon, T. Takano, Y. Iwasa, Y. Ohishi, M. Takata, N. Takeshita, K. Prassides, et al. (2009)
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Band Structure and Fermi Surface of Electron-Doped C60 Monolayers.
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