Electrostatic tuning of the superconductor-insulator transition in two dimensions.
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.
Parendo
Kevin A
KA
School of Physics and Astronomy, University of Minnesota, Minneapolis, 55455, USA.
Tan
K H Sarwa B
KH
Bhattacharya
A
A
Eblen-Zayas
M
M
Staley
N E
NE
Goldman
A M
AM