0_1556 Conventional, textbook experience suggests an electric field cannot affect the properties of superconductors beyond a small distance within it. Recent experiments in superconducting thin films, however, have shown this to be false; a strong enough electric field suppresses and even drives to zero the current running through a superconductor, thus entirely destroying superconductivity. In this talk, I will show how a suitably modified Ginzburg-Landau model of superconductivity is able to capture all the essential features of this phenomenon. It does so, by taking into account corrections to the permittivity of the superconductor due to the presence of Cooper pairs. Within this approach, we are able to find excellent qualitative as well as quantitative agreement with recent experimental observations. I will also discuss additional ways for testing our theoretical proposal via superconductor-superconductor electron tunneling.
 Talk based on Phys. Rev. Research 4, 033211 (2022)