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Transition to an Insulating Phase Induced by Attractive Interactions in the Disordered Three-Dimensional Hubbard Model

Bhargavi Srinivasan·Giuliano Benenti·Dima L. Shepelyansky
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Abstract

We study numerically the interplay of disorder and attractive interactions for spin-1/2 fermions in the three-dimensional Hubbard model. The results obtained by projector quantum Monte Carlo simulations show that at moderate disorder, increasing the attractive interaction leads to a transition from delocalized superconducting states to the insulating phase of localized pairs. This transition takes place well within the metallic phase of the single-particle Anderson model.

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Bhargavi Srinivasan, Giuliano Benenti, Dima L. Shepelyansky. 2002-03-25. Transition to an Insulating Phase Induced by Attractive Interactions in the Disordered Three-Dimensional Hubbard Model. https://doi.org/10.1103/physrevb.66.172506

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