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
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31.03.2009
Published in:
- 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
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
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- English
- Classification
- Physics
- License
- License undefined
- Identifiers
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- RERO DOC 12025
- DOI 10.1103/PhysRevB.79.100510
- Persistent URL
- https://folia.unifr.ch/unifr/documents/301197
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