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.
Original language | English |
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Article number | 237001 |
Journal | Physical Review Letters |
Volume | 95 |
Issue number | 23 |
DOIs | |
State | Published - Dec 2 2005 |