Nodal/Antinodal Dichotomy and the Two Gaps of a Superconducting Doped Mott Insulator

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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.
Corrected typos, 4.5 pages, 4 figures

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Strongly Correlated Electrons

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http://salesiana.dossiersoluciones.com/handle/123456789/153898

Consulte el texto completo en el siguiente enlace:

https://arxiv.org/abs/0704.1486
 http://arxiv.org/abs/0704.1486
 Phys. Rev. Lett. 100, 046402 (2008)
 doi:10.1103/PhysRevLett.100.046402

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arXiv