Superconductivity and antiferromagnetism in the two-dimensional Hubbard model: a variational study
- Eichenberger, David Department of Physics, University of Fribourg, Switzerland
- Baeriswyl, Dionys Department of Physics, University of Fribourg, Switzerland
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30.11.2007
Published in:
- Physical Review B. - 2007, vol. 76, p. 180504(R)
English
A variational ground state of the repulsive Hubbard model on a square lattice is investigated numerically for an intermediate coupling strength (U=8t) and for moderate sizes (from 6×6 to 10×10). Our ansatz is superior to other widely used variational wave functions. The results for order parameters and correlation functions provide insight into the antiferromagnetic state at half-filling as well as strong evidence for a superconducting phase away from half-filling.
- 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 8426
- DOI 10.1103/PhysRevB.76.180504
- Persistent URL
- https://folia.unifr.ch/unifr/documents/300573
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