Abstract
Ferroelectric polarization effects of the heterostructures normal metal-ferroelectric-superconducting high-Tc film are studied in the transverse electrostatic field. A boundary condition for the Ginzburg-Landau wave function of a one-band superconductor at surfaces biased by a strong electrostatic transverse electric field is derived within the de Gennes approach. This boundary condition is applied to the metal-ferroelectric-superconductor structures. The coherence length is critical and it supports the existence of thin superconducting films, such as high-Tc cuprates and other compounds with high transition temperature. We have found various electric field effects in these systems.
Acknowledgment
The research was supported by the Estonian Ministry of Education and Research (SF0180013s07) and by the European Union through the European Regional Development Fund (TK114, SF0180013s07AP).