Journal
PHYSICAL REVIEW LETTERS
Volume 108, Issue 21, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevLett.108.216401
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Funding
- FQRNT
- Tier I Canada Research Chair
- NSF [DMR-0746395]
- Harvard Physics Department
- MIT-Harvard Center for Ultracold Atoms
- Division Of Materials Research
- Direct For Mathematical & Physical Scien [0746395] Funding Source: National Science Foundation
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An intricate interplay between superconductivity, pseudogap, and Mott transition, either bandwidth driven or doping driven, occurs in materials. Layered organic conductors and cuprates offer two prime examples. We provide a unified perspective of this interplay in the two-dimensional Hubbard model within cellular dynamical mean-field theory on a 2 x 2 plaquette and using the continuous-time quantum Monte Carlo method as impurity solver. Both at half filling and at finite doping, the metallic normal state close to the Mott insulator is unstable to d-wave superconductivity. Superconductivity can destroy the first-order transition that separates the pseudogap phase from the overdoped metal, yet that normal state transition leaves its marks on the dynamic properties of the superconducting phase. For example, as a function of doping one finds a rapid change in the particle-hole asymmetry of the superconducting density of states. In the doped Mott insulator, the dynamical mean-field superconducting transition temperature T-c(d) does not scale with the order parameter when there is a normal-state pseudogap. T-c(d) corresponds to the local pair formation temperature observed in tunneling experiments and is distinct from the pseudogap temperature.
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