Theory for the Interdependence of High-T$_c$ Superconductivity and Dynamical Spin Fluctuations

S. Grabowski; J. Schmalian; M. Langer; K. H. Bennemann

doi:10.1016/0038-1098(95)00842-x

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Theory for the Interdependence of High-T$_c$ Superconductivity and Dynamical Spin Fluctuations

S. Grabowski·J. Schmalian·M. Langer·K. H. Bennemann

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Abstract

The doping dependence of the superconducting state for the 2D one-band Hubbard Hamiltonian is determined. By using an Eliashberg-type theory, we find that the gap function $Δ_{\bf k}$ has a $d_{x^2-y^2}$ symmetry in momentum space and T$_c$ becomes maximal for $13 \; \%$ doping. Since we determine the dynamical excitations directly from real frequency axis calculations, we obtain new structures in the angular resolved density of states related to the occurrence of {\it shadow states} below T$_c$. Explaining the anomalous behavior of photoemission and tunneling experiments in the cuprates, we find a strong interplay between $d$-wave superconductivity and dynamical spin fluctuations.

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S. Grabowski, J. Schmalian, M. Langer, K. H. Bennemann. 1995-06-29. Theory for the Interdependence of High-T$_c$ Superconductivity and Dynamical Spin Fluctuations. https://doi.org/10.1016/0038-1098(95)00842-x

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