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Published on: August 2, 2019
Electrostatic tuning of the superconductor-insulator transition in two dimensions
Kevin A Parendo1, K H Sarwa B Tan, A Bhattacharya
1School of Physics and Astronomy, University of Minnesota, Minneapolis, 55455, USA.
Abstract:
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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