Superconductivity in the t-J model in the large-N limit |
| |
Authors: | R Zeyher A Greco |
| |
Institution: | 16. Max-Planck-Institut für Festk?rperforschung, Heisenbergstrasse 1, D-70569, Stuttgart, Germany
|
| |
Abstract: | Using a 1/N expansion for X-operators the leading contributions to the linearized equation for the superconducting gap of the t-J model are derived and the gap equation solved numerically on a square lattice. We find a strong instability towards superconductivity only in the d-wave (T 3) channel with T c/│t│ ~ 0:01 where T c is the transition temperature and t the nearest-neighbor hopping integral. The underlying effective interaction consists of an attractive, instantaneous term with the band width, and a retarded term due to charge and spin fluctuations with ~ J, as energy scale. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|