This work has been presented at the Fifth Russian-Japanese Symposium on Ferroelectricity (Moscow, 1994) and published in Proceedings of Symposium (Ferroelectrics, v. 170, p. 57-63 (1995)).

Ferroelectric-superconductor structures

V.V. Lemanov

A.F.Joffe Physico-Technical Institute, 194021 St.Petersburg

The spontaneous polarization of ferroelectric in ferroelectric-superconductor layered structure induces change of electric properties of superconductor. The effect is due to energy band bending and depletion or enhancement of charge carriers under action of spontaneous polarization. As a result a shift of superconductor critical temperature and change of resistance in the normal and mixed states along with critical current variation should be observed. Stadler [1] was the first to study the effect of the spontaneous polarization of TGS substrate on the electric properties of Sn superconducting film. The effect of the spontaneous polarization of BaTiO₃ and LiNbO₃ substrates on the electric properties of YBCO high-T_c superconductor was studied in [2].

The ferroelectric-superconductor layered structures open the new possibilities of technical applications of these structures in ferroelectric field-effect transistors with memory [3] and in some other devices.

The aim of this presentation is to give a review of basic and applied research on ferroelectric-superconductor structures.

1. H.L. Stadler, Phys.Rev.Lett. 14, 979, 1965.
2. V.V. Lemanov, A.L. Kholkin and A.B. Sherman, Pis'ma Zh.Exp.Teor.Fiz. 56, 580, 1992.
3. V.V. Lemanov, S.T. Pavlov and I.S. Pivovarov, Pis'ma Zh.Techn.Fiz. 18, 55, 1992.

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