Nodal-antinodal dichotomy and the two gaps of a superconducting doped Mott insulator.
Phys Rev Lett
; 100(4): 046402, 2008 Feb 01.
Article
em En
| MEDLINE
| ID: mdl-18352310
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.
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01-internacional
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MEDLINE
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En
Ano de publicação:
2008
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Article