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Electron doping and superconductivity in the two-dimensional Hubbard model

D. Eichenberger and D. Baeriswyl
Phys. Rev. B 79, 100510(R) – Published 31 March 2009

Abstract

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 d-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.

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  • Received 21 November 2008

DOI:https://doi.org/10.1103/PhysRevB.79.100510

©2009 American Physical Society

Authors & Affiliations

D. Eichenberger and D. Baeriswyl

  • Department of Physics, University of Fribourg, CH-1700 Fribourg, Switzerland

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Issue

Vol. 79, Iss. 10 — 1 March 2009

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