Metal-Insulator Transition in a System of Superconducting Vortices Caused by a Metallic Gate
K. Michaeli, A. M. Finkel’stein
DOI 10.1103/PhysRevLett.97.117004 · Physical Review Letters
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Abstract
We address a recent experiment in which a strong decrease of the resistance of a superconducting film has been observed when a remote unbiased gate was placed above the film. Here we explain the experimental finding as a suppression of the vortex tunneling due to the orthogonality catastrophe of the electrons inside the gate. We interpret the change in the resistance of the film as a “metal-insulator” transition in the system of vortices induced by the gate.
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