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Phys. Rev. Lett. 95, 237001 (2005) [4 pages]

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

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T. A. Maier1, M. Jarrell2, T. C. Schulthess1, P. R. C. Kent3, and J. B. White1
1Computer Science and Mathematics Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831, USA
2Department of Physics, University of Cincinnati, Cincinnati, Ohio 45221, USA
3University of Tennessee, Knoxville, Tennessee 37996, USA

Received 20 April 2005; published 29 November 2005

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.


©2005 The American Physical Society

URL: http://link.aps.org/doi/10.1103/PhysRevLett.95.237001
DOI: 10.1103/PhysRevLett.95.237001
PACS: 74.20.−z, 71.10.−w, 71.27.+a, 74.72.−h

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