Superconducting ground state of the two-dimensional Hubbard model: a variational study
- Eichenberger, David Département de physique, Université de Fribourg, Switzerland
- Baeriswyl, Dionys Département de physique, Université de Fribourg, Switzerland
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04.04.2007
Published in:
- Physica C: Superconductivity. - 2007, vol. 460-462, no. 2, p. 1153-1154
English
A trial wave function is proposed for studying the instability of the two-dimensional Hubbard model with respect to d-wave superconductivity. Double occupancy is reduced in a similar way as in previous variational studies, but in addition our wave function both enhances the delocalization of holes and induces a kinetic exchange between the electron spins. These refinements lead to a large energy gain, while the pairing appears to be weakly affected by the additional term in the variational wave function.
- 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 8425
- DOI 10.1016/j.physc.2007.03.366
- Persistent URL
- https://folia.unifr.ch/unifr/documents/300564
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