Suppression of d-wave superconductivity in the checkerboard Hubbard model

Abstract

Using a dynamical cluster quantum Monte Carlo approximation we investigate the d-wave superconducting transition temperature $T_c$ in the doped 2D repulsive Hubbard model with a weak inhomogeneity. The inhomogeneity is introduced in the hoppings $\tp$ and $t$ in the form of a checkerboard pattern where $t$ is the hopping within a $2\times 2$ plaquette and $\tp$ is the hopping between the plaquettes. We find inhomogeneity suppresses $T_c$. The characteristic spin excitation energy and the strength of d-wave pairing interaction decrease with decreasing $T_c$ suggesting a strong correlation between these quantities.

Five pages, four figures. Accepted for Phys. Rev. B (Rapid Com.)

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Cited by in corpus (12)

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• Determinant Quantum Monte Carlo Study of the Enhancement of d-wave Pairing by Charge Inhomogeneity
• Dynamic cluster quantum Monte Carlo simulations of a two-dimensional Hubbard model with stripe-like charge density wave modulations: Interplay between inhomogeneity and superconductivity
• Determinant Quantum Monte Carlo Study of d-wave pairing in the Plaquette Hubbard Hamiltonian
• A contractor-renormalization study of Hubbard plaquette clusters
• Magnetization, d-wave superconductivity and non-Fermi liquid behavior in a crossover from dispersive to flat bands
• Quantum phase transitions of multi-species Dirac fermions
• d-Wave superconductivity on the checkerboard Hubbard model at weak and strong coupling
• Optimal inhomogeneity for pairing in Hubbard systems with next-nearest-neighbor hopping
• Disorder effects on superconducting tendencies in the checkerboard Hubbard model