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Theory for Electron-Doped Cuprate Superconductors: d-wave symmetry order parameter

D. Manske·I. Eremin·K. H. Bennemann
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Abstract

Using as a model the Hubbard Hamiltonian we determine various basic properties of electron-doped cuprate superconductors like ${Nd}_{2-x}{Ce}_{x}{CuO}_{4}$ and ${Pr}_{2-x}{Ce}_{x}{CuO}_{4}$ for a spin-fluctuation-induced pairing mechanism. Most importantly we find a narrow range of superconductivity and like for hole-doped cuprates $d_{x^{2}-y^{2}}$ - symmetry for the superconducting order parameter. The superconducting transition temperatures $T_{c}(x)$ for various electron doping concentrations $x$ are calculated to be much smaller than for hole-doped cuprates due to the different Fermi surface and a flat band well below the Fermi level. Lattice disorder may sensitively distort the symmetry $d_{x^{2}-y^{2}}$ via electron-phonon interaction.

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D. Manske, I. Eremin, K. H. Bennemann. 2000-04-26. Theory for Electron-Doped Cuprate Superconductors: d-wave symmetry order parameter. https://doi.org/10.1103/physrevb.62.13922

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