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Phys Rev Lett. 2005 May 20;94(19):197004. Epub 2005 May 18.

Electrostatic tuning of the superconductor-insulator transition in two dimensions.

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School of Physics and Astronomy, University of Minnesota, Minneapolis, 55455, USA.

Erratum in

  • Phys Rev Lett. 2005 Jul 22;95(4):049902. Sarwa, KH [corrected to Tan, KH Sarwa B]; Tan, B [corrected to Tan, KH Sarwa B].


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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