Induced polarization at a paraelectric/superconducting interface

J. T. Haraldsen; S. A. Trugman; A. V. Balatsky

doi:10.1103/PhysRevB.84.020103

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Induced polarization at a paraelectric/superconducting interface

J. T. Haraldsen, S. A. Trugman, A. V. Balatsky

DOI 10.1103/PhysRevB.84.020103 · Physical Review B

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Abstract

We examine the modified electronic states at the interface between superconducting and ferro(para)electric heterostructures. We find that electric polarization P and superconducting ψ 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 ψ at the interface. This also produces modulation of a ferroelectric polarization. It is shown that a paraelectric-superconductor interaction will produce an interface-induced polarization.

Source-reported materials — not catalogue approval

Formula	Reported Tc (K)	Pressure (GPa)	Type
LaAlO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown
SrTiO3 Archive — visibility unverified Source-occurrence policy only; no material identity or catalogue acceptance is inferred from the formula.	—	Pressure not reported	unknown