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Electrostatic tuning of the superconductor-insulator transition in two dimensions

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PHYSICAL REVIEW LETTERS
卷 94, 期 19, 页码 -

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AMERICAN PHYSICAL SOC
DOI: 10.1103/PhysRevLett.94.197004

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Superconductivity has been induced in insulating ultrathin films of amorphous bismuth using the electric field effect. The screening of the electron-electron interaction was found to increase with electron concentration in a manner correlated with the tendency towards superconductivity. This does not preclude an increase in the density of states being important in the development of superconductivity. The superconductor-insulator transition appears to belong to the universality class of the three dimensional XY model.

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