Electrostatic Tuning of the Superconductor-Insulator Transition in Two Dimensions

Details Electrostatic Tuning of the Superconductor-Insulator Transition in Two Dimensions Electrostatic Tuning of the Superconductor-Insulator Transition in Two Dimensions

2005-01-27

arxiv.org/abs/cond-mat/0501666v2

Physics

Condensed Matter

Superconductivity

Four pages, three figures. Revised slightly to reflect referees' comments

Scientific paper

10.1103/PhysRevLett.94.197004

Superconductivity has been induced in insulating ultra-thin films of amorphous bismuth using the electric field effect. The screening of 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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