Electron doping and superconductivity in the two-dimensional Hubbard model

Eichenberger, David; Baeriswyl, Dionys

doi:10.1103/PhysRevB.79.100510

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Journal article

Electron doping and superconductivity in the two-dimensional Hubbard model

Eichenberger, David Department of Physics, University of Fribourg, Switzerland
Baeriswyl, Dionys Department of Physics, University of Fribourg, Switzerland

31.03.2009

Published in:

Physical Review B. - 2009, vol. 79, no. 10, p. 100510(R)

high-temperature superconductors

English 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.

Faculty

Faculté des sciences et de médecine

Department

Département de Physique

Language