# First-order superconductor-to-insulator transition: Evidence for a supersolid phase Academic Article

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### abstract

• The superconductor to insulator transition in the presence of long-range Coulomb interactions is studied using Monte Carlo techniques. At integer filling the transition is second order. At half filling we find evidence of a first order transition to a state with non-zero $S_{\pi,\pi}$. No intervening supersolid phase is observed. Off half-filling two separate transitions are found. The transition from the superconducting to a supersolid phase is second order followed by another second order transition between the supersolid and an insulating phase.

### publication date

• April 1, 1996