|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.|
|Keywords||2008, No Fellows|
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.