Eichenberger, David Baeriswyl, Dionys 2009-03-31 An elaborate variational wave function is used for studying superconductivity in the (repulsive) two-dimensional Hubbard model, including both nearest- and next-nearest-neighbor hoppings. A marked asymmetry is found between the “localized” hole-doped region and the more itinerant electron-doped region. Superconductivity with <i>d</i>-wave symmetry turns out to be restricted to densities where the Fermi surface crosses the magnetic zone boundary. A concomitant peak in the magnetic structure factor at (π,π) clearly points to a magnetic mechanism. application/pdf https://folia.unifr.ch/global/documents/301197 https://folia.unifr.ch/documents/301197/files/eichenberger_eds.pdf eng info:eu-repo/semantics/altIdentifier/doi/10.1103/PhysRevB.79.100510 info:eu-repo/semantics/openAccess License undefined Physical Review B. - 2009, vol. 79, no. 10, p. 100510(R) doping d-wave superconductivity Fermi surface high-temperature superconductors Hubbard model magnetic structure variational techniques wave functions info:eu-repo/classification/udc/53 Electron doping and superconductivity in the two-dimensional Hubbard model http://purl.org/coar/resource_type/c_6501