The interplay between d-wave superconductivity and antiferromagnetic fluctuations: a quantum Monte Carlo study
| dc.creator | Assaad, F. F. | |
| dc.date | 1998-06-25 | |
| dc.date.accessioned | 2026-07-07T03:10:54Z | |
| dc.date.available | 2026-07-07T03:10:54Z | |
| dc.description | We consider the repulsive Hubbard model on a square lattice with an additional term, W, which depends upon the square of a single-particle nearest-neighbor hopping. At half-band filling, constant W, we show that enhancing U/t drives the system from a d-wave superconductor to an antiferromagnetic Mott insulator. At zero temperature in the superconducting phase, spin-spin correlations follow a powerlaw: exp(-i r Q) |r|^(-alpha). Here Q = (pi, pi) and alpha is in the range 1 < alpha < 2 and depends upon the coupling constants W and U. This results is reached on the basis of large scale quantum Monte-Carlo simulations on lattices up to 24 times 24, and is shown to be independent on the choice of the boundary conditions. We define a pairing (magnetic) scale by the temperature below which short range d-wave pairing correlations (antiferromagnetic fluctuations) start growing. With finite temperature quantum Monte Carlo simulations, we demonstrate that both scales are identical over a large energy range. Those results show the extreme compatibility and close interplay of antiferromagnetic fluctuations and d-wave superconductivity. | |
| dc.description | 4 pages including 6 figures in encapsulated postscript format | |
| dc.identifier | https://arxiv.org/abs/cond-mat/9806306 | |
| dc.identifier | http://arxiv.org/abs/cond-mat/9806306 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/28380 | |
| dc.subject | Strongly Correlated Electrons | |
| dc.subject | Superconductivity | |
| dc.title | The interplay between d-wave superconductivity and antiferromagnetic fluctuations: a quantum Monte Carlo study | |
| dc.type | text |