Quantum Transition between an Antiferromagnetic Mott Insulator and $d_{x^2 - y^2}$ Superconductor in Two Dimensions

Details Quantum Transition between an Antiferromagnetic Mott Insulator and $d_{x^2 - y^2}$ Superconductor in Two Dimensions Quantum Transition between an Antiferromagnetic Mott Insulator and $d_{x^2 - y^2}$ Superconductor in Two Dimensions

1996-09-03

arxiv.org/abs/cond-mat/9609034v1

Physics

Condensed Matter

4 pages (latex) and 4 postscript figures

Scientific paper

10.1103/PhysRevLett.77.4592

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 $d_{x^2 -y^2}$ superconductor. This conclusion is reached on the basis of zero temperature quantum Monte Carlo simulations on lattice sizes up to $16 \times 16$.

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