Effect of long-range hopping on Tc in a two-dimensional Hubbard-Holstein model of the cuprates
| dc.creator | Khatami, E. | |
| dc.creator | Macridin, A. | |
| dc.creator | Jarrell, M. | |
| dc.date | 2008-06-24 | |
| dc.date | 2009-01-20 | |
| dc.date.accessioned | 2026-07-07T12:31:21Z | |
| dc.date.available | 2026-07-07T12:31:21Z | |
| dc.description | We study the effect of long-range hoppings on Tc for the two-dimensional (2D) Hubbard model with and without Holstein phonons using parameters evaluated from band-structure calculations for cuprates. Employing the dynamical cluster approximation (DCA) with a quantum Monte Carlo (QMC) cluster solver for a 4-site cluster, we observe that without phonons, the long-range hoppings, t' and t'', generally suppress Tc. We argue that this trend remains valid for larger clusters. In the presence of the Holstein phonons, a finite t' enhances Tc in the under-doped region for the hole-doped system, consistent with local-density approximation (LDA) calculations and experiment. This is interpreted through the suppression of antiferromagnetic (AF) correlations and the interplay between polaronic effects and the antiferromagnetism. | |
| dc.description | 5 pages, 4 figures | |
| dc.identifier | https://arxiv.org/abs/0806.3996 | |
| dc.identifier | http://arxiv.org/abs/0806.3996 | |
| dc.identifier | Phys. Rev. B 78, 060502(R) (2008) | |
| dc.identifier | doi:10.1103/PhysRevB.78.060502 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/216417 | |
| dc.subject | Superconductivity | |
| dc.subject | Strongly Correlated Electrons | |
| dc.title | Effect of long-range hopping on Tc in a two-dimensional Hubbard-Holstein model of the cuprates | |
| dc.type | text |