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Electronic structure of strongly correlated d-wave superconductors

Bernhard Edegger, V. N. Muthukumar, Claudius Gros, P. W. Anderson

cond-mat.supr-conarXiv:cond-mat/0512646

Abstract

We study the electronic structure of a strongly correlated d-wave superconducting state. Combining a renormalized mean field theory with direct calculation of matrix elements, we obtain explicit analytical results for the nodal Fermi velocity, vF, the Fermi wave vector, kF, and the momentum distribution, nk, as a function of hole doping in a Gutzwiller projected d-wave superconductor. We calculate the energy dispersion, Ek, and spectral weight of the Gutzwiller-Bogoliubov quasiparticles, and find that the spectral weight associated with the quasiparticle excitation at the antinodal point shows a non monotonic behavior as a function of doping. Results are compared to angle resolved photoemission spectroscopy (ARPES) of the high temperature superconductors.

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