Conclusion
The idea that superconducting cuprates are doped Mott insulator first proposed by Anderson permits to explain many unusual properties of the metallic phase. The discrepancy sometimes obtained or the lack of explanation mainly rely on the absence of exact theory of the Mott transition obtained by doping. Even the qualitative physical picture is not completely set up. We propose a model of “excitonic” metal where the range of energy in which the Fermi liquid theory holds shrinks near the transition. Excitonic superconductivity could explain the unusual superconducting properties.
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Cyrot, M. (2002). Mott Metal-Insulator Transition in Oxides. In: Bok, J., Deutscher, G., Pavuna, D., Wolf, S.A. (eds) The Gap Symmetry and Fluctuations in High-Tc Superconductors. NATO Science Series: B:, vol 371. Springer, Boston, MA. https://doi.org/10.1007/0-306-47081-0_5
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