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Abstract
A new superconducting Hamiltonian is introduced for which the exact ground state is the Anderson resonating valence bond. It differs from the t–J and Hubbard Hamiltonians in possessing a powerful attractive force. Its superconducting state is characterized by a full and intact d-wave tunnelling gap, quasiparticle photoemission intensities that are strongly suppressed, a suppressed superfluid density, and an incipient Mott–Hubbard gap.
Acknowledgments
I wish to express particular thanks to Z.-X. Shen and my other NEDO collaborators H. Eisaki, A. Fujimori, S. Maekawa, N. Nagaosa, N. P. Ong, Y. Tokura, and S. Uchida for their collegiality and innumerable helpful discussions. This work was supported by the Department of Energy under contract No. DE-AC03-76SF00515.
