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. RI Parcollet, Olivier/C-2340-2008; Capone, Massimo/A-7762-2008; Georges, Antoine/H-4855-2012
Nodal-antinodal dichotomy and the two gaps of a superconducting doped Mott insulator / Civelli, M; Capone, Massimo; Georges, A; Haule, K; Parcollet, O; Stanescu, Td; Kotliar, G.. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 100:4(2008). [10.1103/PhysRevLett.100.046402]
Nodal-antinodal dichotomy and the two gaps of a superconducting doped Mott insulator
Capone, Massimo;
2008-01-01
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. RI Parcollet, Olivier/C-2340-2008; Capone, Massimo/A-7762-2008; Georges, Antoine/H-4855-2012I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
