PhysicsRevB.79.212501.pdf (123.07 kB)
Superconductivity in a Hubbard-Frohlich model and in cuprates
journal contribution
posted on 2009-08-06, 08:38 authored by Thomas M. Hardy, J.P. Hague, John Samson, A.S. AlexandrovUsing the variational Monte Carlo method, we find that a relatively weak long-range electron-phonon
interaction induces a d-wave superconducting state in doped Mott-Hubbard insulators and/or strongly correlated
metals with a condensation energy significantly larger than can be obtained with Coulomb repulsion only.
Moreover, the superconductivity is shown to exist for infinite on-site Coulomb repulsion without the need for
additional mechanisms such as spin fluctuations to mediate d-wave superconductivity. We argue that our
superconducting state is robust with respect to a more intricate choice of the trial-wave function and that a
possible origin of high-temperature superconductivity lies in a proper combination of strong electron-electron
correlations with poorly screened Fröhlich electron-phonon interaction.
History
School
- Science
Department
- Physics
Citation
HARDY, T.M. ... et al, 2009. Superconductivity in a Hubbard-Frohlich model and in cuprates. Physical Review B, 79, 212501, pp.1-4.Publisher
© American Physical SocietyVersion
- VoR (Version of Record)
Publication date
2009Notes
This article has been published in the journal, Physical Review B [© American Physical Society]. It is also available at: http://link.aps.org/doi/10.1103/PhysRevB.79.212501ISSN
1098-0121;1550-235xLanguage
- en