Pseudogap at hot spots in the two-dimensional Hubbard model at weak coupling
| dc.creator | Rohe, Daniel | |
| dc.creator | Metzner, Walter | |
| dc.date | 2004-06-07 | |
| dc.date | 2005-03-31 | |
| dc.date.accessioned | 2026-07-07T02:58:31Z | |
| dc.date.available | 2026-07-07T02:58:31Z | |
| dc.description | We analyze the interaction-induced renormalization of single-particle excitations in the two-dimensional Hubbard model at weak coupling using the Wick-ordered version of the functional renormalization group. The self energy is computed for real frequencies by integrating a flow equation with renormalized two-particle interactions. In the vicinity of hot spots, that is points where the Fermi surface intersects the umklapp surface, self energy effects beyond the usual quasi-particle renormalizations and damping occur near instabilities of the normal, metallic phase. Strongly enhanced renormalized interactions between particles at different hot spots generate a pronounced low-energy peak in the imaginary part of the self energy, leading to a pseudogap-like double-peak structure in the spectral function for single-particle excitations. | |
| dc.description | 14 pages, 7 figures | |
| dc.identifier | https://arxiv.org/abs/cond-mat/0406164 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/0406164 | |
| dc.identifier | Phys. Rev. B 71, 115116 (2005) | |
| dc.identifier | doi:10.1103/PhysRevB.71.115116 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/24128 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Pseudogap at hot spots in the two-dimensional Hubbard model at weak coupling | |
| dc.type | text |