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

F. F. Assaad; M. Imada; D. J. Scalapino

doi:10.1103/physrevlett.77.4592

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

F. F. Assaad·M. Imada·D. J. Scalapino

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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 $d_{x^2 -y^2}$ 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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F. F. Assaad, M. Imada, D. J. Scalapino. 1996-09-03. Quantum Transition between an Antiferromagnetic Mott Insulator and $d_{x^2 - y^2}$ Superconductor in Two Dimensions. https://doi.org/10.1103/physrevlett.77.4592

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