dx2−y2 superconductivity in a model of correlated fermions
Alexander Nazarenko, Adriana Moreo, Elbio Dagotto, Jose Riera
DOI 10.1103/PhysRevB.54.R768 · Physical Review B
Active bibliographic source — not scientific approval
Bibliographic access preserves source history; it does not approve extracted materials or validate reported claims. Review warnings on each occurrence separately.
Abstract
A two-dimensional fermionic model with attractive interactions is discussed. Its form is motivated by the phenomenology of the underdoped high-Tc cuprates, as discussed in previous literature. The exact solution to the two-particle problem leads to a bound state in the dx2−y2 subspace. Numerical techniques show that the model has strong dx2−y2 pairing correlations in the ground state at low fermionic density. Within a self-consistent random phase approximation diagrammatic study, the model has a d-wave superconducting (SC) phase. The density dependence of the critical temperature is calculated. We argue that in the context of d-wave SC this model fulfills the role that the attractive on-site Hubbard model has played for s-wave SC. We also show that another candidate, the attractive t−U−V model, is actually not useful as a toy model for d-wave SC for a variety of reasons.
Similar papers
d-Wave Superconductivity in the Hubbard Model
similarity 0.91Th. Maier et al.
Source status unknown — claims are unverified
Systematic Study of d-Wave Superconductivity in the 2D Repulsive Hubbard Model
similarity 0.91T. A. Maier et al.
Source status unknown — claims are unverified
A Spin Fluctuation Model for D-wave Superconductivity
similarity 0.89Andrey V. Chubukov et al. · 2002 · arXiv:cond-mat/0201140
Source status unknown — claims are unverified
Phase Diagram of the Hubbard Model: Beyond the Dynamical Mean Field
similarity 0.89M. Jarrell et al. · 2000 · arXiv:cond-mat/0011282
Source status unknown — claims are unverified
Pairing in the Two-Dimensional Hubbard Model from Weak to Strong Coupling
similarity 0.89Astrid T. Rømer et al. · 2019 · arXiv:1909.00627
Source status unknown — claims are unverified
Reexamination of d-wave superconductivity in the two-dimensional Hubbard model
similarity 0.88Takao Morinari · 2002 · arXiv:cond-mat/0201058
Source status unknown — claims are unverified