We consider the effective extended Hubbard Hamiltonian for the cuprates, with nearest-neighbor hopping which depends on the occupation. Using exact diagonalization in a 4 × 4 cluster, we obtain a large enhancement of d-wave pairing correlation functions for optimum doping. The physical picture is consistent with magnetic measurements, the pseudogap and the kinetic energy gain in the cuprates. © 2004 Elsevier B.V. All rights reserved.
Documento: | Artículo |
Título: | D-wave superconductivity in the effective extended Hubbard model for cuprates |
Autor: | Arrachea, L.; Aligia, A.A. |
Ciudad: | Rio de Janeiro |
Filiación: | Sc. Intl. Sup. di Studi Avanzati, Ist. Naz. per la Fis. della Materia, Via Beirut 4, I-34014 Trieste, Italy Comn. Nac. de Ener. Atómica, Centro Atómico Bariloche, Instituto Balseiro, 8400 SC, de Bariloche, Argentina Departamento de Física, Universidad de Buenos Aires, Cd. Universitaria Pabellón I, (1428) Buenos Aires, Argentina |
Palabras clave: | Correlated hopping; Extended Hubbard model; Pairing mechanism; Symmetry of the order parameter; Correlated hopping; Extended Hubbard model; Order paremeters; Pairing mechanism; Chemical bonds; Doping (additives); Hamiltonians; Kinetic energy; Mathematical models; Oxide superconductors; Superconductivity |
Año: | 2004 |
Volumen: | 408-410 |
Número: | 1-4 |
Página de inicio: | 224 |
Página de fin: | 225 |
DOI: | http://dx.doi.org/10.1016/j.physc.2004.02.158 |
Título revista: | Proceedings of the International Conference on Materials |
Título revista abreviado: | Phys C Supercond Appl |
ISSN: | 09214534 |
CODEN: | PHYCE |
Registro: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_09214534_v408-410_n1-4_p224_Arrachea |