Systematic Study of d-Wave Superconductivity in the 2D Repulsive Hubbard Model

T. A. Maier; M. Jarrell; T. C. Schulthess; P. R. C. Kent; J. B. White

doi:10.1103/PhysRevLett.95.237001

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Systematic Study of d-Wave Superconductivity in the 2D Repulsive Hubbard Model

T. A. Maier, M. Jarrell, T. C. Schulthess, P. R. C. Kent, J. B. White

DOI 10.1103/PhysRevLett.95.237001 · Physical Review Letters

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Abstract

The cluster size dependence of superconductivity in the conventional two-dimensional Hubbard model, commonly believed to describe high-temperature superconductors, is systematically studied using the dynamical cluster approximation and quantum Monte Carlo simulations as a cluster solver. Because of the nonlocality of the d-wave superconducting order parameter, the results on small clusters show large size and geometry effects. In large enough clusters, the results are independent of the cluster size and display a finite temperature instability to d-wave superconductivity.