Induced polarization at a paraelectric/superconducting interface

Details Induced polarization at a paraelectric/superconducting interface Induced polarization at a paraelectric/superconducting interface

2011-03-07

arxiv.org/abs/1103.1395v3

Phys. Rev. B 84, 020103(R) (2011)

Physics

Condensed Matter

Superconductivity

4 pages, 3 figures, Submitted to Phys. Rev. B

Scientific paper

10.1103/PhysRevB.84.020103

We examine the modified electronic states at the interface between superconducting and ferro(para)-electric heterostructures. We find that electric polarization $P$ and superconducting $\psi$ order parameters can be significantly modified due to coupling through linear terms brought about by explicit symmetry breaking at the interface. Using an effective action and a Ginzburg-Landau formalism, we show that an interaction term linear in the electric polarization will modify the superconducting order parameter $\psi$ at the interface. This also produces modulation of a ferroelectric polarization. It is shown that a paraelectric-superconductor interaction will produce an interface-induced ferroelectric polarization.

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