Phys. Rev. Lett. 88, 117002 (2002) [4 pages]Superconductivity in the Two-Dimensional t-J ModelReceived 18 September 2001; published 28 February 2002 Using computational techniques, it is shown that pairing is a robust property of hole-doped antiferromagnetic insulators. In one dimension and for two-leg ladder systems, a BCS-like variational wave function with long-bond spin singlets and a Jastrow factor provides an accurate representation of the ground state of the t-J model, even though strong quantum fluctuations destroy the off-diagonal superconducting long-range order in this case. However, in two dimensions it is argued—and numerically confirmed using several techniques, especially quantum Monte Carlo—that quantum fluctuations are not strong enough to suppress superconductivity. © 2002 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.88.117002
DOI:
10.1103/PhysRevLett.88.117002
PACS:
74.20.Mn, 71.10.Fd, 71.10.Pm, 71.27.+a
See AlsoComment: T. K. Lee, C. T. Shih, Y. C. Chen, and H. Q. Lin, Comment on “Superconductivity in the Two-Dimensional t- J Model”, Phys. Rev. Lett. 89, 279702 (2002). Reply: S. Sorella, A. Parola, F. Becca, L. Capriotti, C. Gazza, E. Dagotto, and G. Martins, Sorella et al. Reply:, Phys. Rev. Lett. 89, 279703 (2002). |
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