Title | Nodal-Antinodal Dichotomy and the Two Gaps of a Superconducting Doped Mott Insulator |
Publication Type | Journal Article |
Year of Publication | 2008 |
Authors | M. Civelli, M. Capone, A. Georges, K. Haule, O. Parcollet, T. D. Stanescu, and G. Kotliar |
Journal | Phys. Rev. Lett. |
Volume | 100 |
Pagination | 5 |
Date Published | jan |
ISSN | 0031-9007 |
Keywords | 2008, No Fellows |
Abstract | We study the superconducting state of the hole-doped two-dimensional Hubbard model using Cellular Dynamical Mean Field Theory, with the Lanczos method as impurity solver. In the under-doped regime, we find a natural decomposition of the one-particle (photoemission) energy-gap into two components. The gap in the nodal regions, stemming from the anomalous self-energy, decreases with decreasing doping. The antinodal gap has an additional contribution from the normal component of the self-energy, inherited from the normal-state pseudogap, and it increases as the Mott insulating phase is approached. |
URL | http://arxiv.org/abs/0704.1486 |