title: Nodal-antinodal dichotomy and the two gaps of a superconducting doped Mott insulator.
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 underdoped 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.
authors: Theory Group, Institut Laue Langevin, Grenoble, France.
authors: M
authors: M
authors: Civelli
authors: M
authors: M
authors: Capone
authors: A
authors: A
authors: Georges
authors: K
authors: K
authors: Haule
authors: O
authors: O
authors: Parcollet
authors: T D
authors: TD
authors: Stanescu
authors: G
authors: G
authors: Kotliar