Quantum Transition between an Antiferromagnetic Mott Insulator and d_{x² - y²} Superconductor in Two Dimensions

1996/09/03 by F. F. Assaad, M. Imada, D. J. Scalapino
Physics and Astronomy · #cond-mat

paper · pdf · doi:10.1103/physrevlett.77.4592

4 pages (latex) and 4 postscript figures

arxiv created 1996/09/03 · arxiv updated 2009/11/30

Abstract

We consider a Hubbard model on a square lattice with an additional interaction, W, which depends upon the square of a near-neighbor hopping. At half-filling and a constant value of the Hubbard repulsion, increasing the strength of the interaction W drives the system from an antiferromagnetic Mott insulator to a d_{x² -y²} superconductor. This conclusion is reached on the basis of zero temperature quantum Monte Carlo simulations on lattice sizes up to 16 × 16.

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