Electric field effect on superconductivity at complex oxide interfaces

Details Electric field effect on superconductivity at complex oxide interfaces Electric field effect on superconductivity at complex oxide interfaces

2011-12-22

arxiv.org/abs/1112.5466v2

Physics

Condensed Matter

Superconductivity

7 Pages, Submitted to Physical Review

Scientific paper

We examine the enhancement of the interfacial superconductivity between LaAlO$_{3}$ and SrTiO$_{3}$ by an effective electric field. Through the breaking of inversion symmetry at the interface, we show that a term coupling the superfluid density and an electric field can augment the superconductivity transition temperature. Microscopically, we show that an electric field can also produce changes in the carrier density by relating the measured capacitance to the density of states. Through the electron-phonon induced interaction in bulk SrTiO$_{3}$, we estimate the transition temperature.

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