The superconducting gap in the Hubbard model and the two gap energy scales in high-Tc cuprates

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dc.creatorAichhorn, M.
dc.creatorArrigoni, E.
dc.creatorHuang, Z. B.
dc.creatorHanke, W.
dc.date2007-02-16
dc.date2007-09-28
dc.date.accessioned2026-07-07T08:50:09Z
dc.date.available2026-07-07T08:50:09Z
dc.descriptionRecent excperiments (ARPES, Raman) suggest the presence of two distinct energy gaps in high-Tc superconductors (HTSC), exhibiting different doping dependences. Results of a variational cluster approach to the superconducting state of the two-dimensional Hubbard model are presented which show that this model qualitatively describes this gap dichotomy: One gap (antinodal) increases with less doping, a behavior long considered as reflecting the general gap behavior of the HTSC. On the other hand, the near-nodal gap does even slightly decrease with underdoping. An explanation of this unexpected behavior is given which emphasizes the crucial role of spin fluctuations in the pairing mechanism.
dc.description4 pages, 5 figures, revised version to be published in Phys. Rev. Lett
dc.identifierhttps://arxiv.org/abs/cond-mat/0702391
dc.identifierhttp://arxiv.org/abs/cond-mat/0702391
dc.identifierPhys. Rev. Lett. 99, 257002 (2007)
dc.identifierdoi:10.1103/PhysRevLett.99.257002
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/144512
dc.subjectStrongly Correlated Electrons
dc.subjectSuperconductivity
dc.titleThe superconducting gap in the Hubbard model and the two gap energy scales in high-Tc cuprates
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