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Abstract: We discuss an effect of the electrostatic field on superconductivity near thesurface. First, we use the microscopic theory of de Gennes to show that theelectric field changes the boundary condition for the Ginzburg-Landau function.Second, the effect of the electric field is evaluated in the vicinity of$H { m c3}$, where the boundary condition plays a crucial role. We predictthat the field effect on the surface superconductivity leads to a discontinuityof the magnetocapacitance. We estimate that the predicted discontinuity isaccessible for nowadays experimental tools and materials. It is shown that themagnitude of this discontinuity can be used to predict the dependence of thecritical temperature on the charge carrier density which can be tailored bydoping.



Author: Pavel Lipavsky, Jan Kolacek, Klaus Morawetz

Source: https://arxiv.org/







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