Electric field effect on superconductivity at complex oxide interfaces

Abstract

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.

7 Pages, Submitted to Physical Review

References in corpus (5)

• Magnetic effects at the interface between nonmagnetic oxides
• Electric Field Control of the LaAlO${}_3$/SrTiO${}_3$ Interface Ground State
• Direct imaging of the coexistence of ferromagnetism and superconductivity at the LaAlO3/SrTiO3 interface
• Origin of charge density at LaAlO3-on-SrTiO3 hetero-interfaces; possibility of intrinsic doping
• Interface-induced d-wave pairing

Cited by in corpus (16)

• Superconductivity in dilute SrTiO${}_3$: a review
• Two-band superconductivity in doped SrTiO${}_3$ films and interfaces
• Accumulation, inversion, and depletion layers in SrTiO${}_3$
• Novel pairing mechanism for superconductivity at a vanishing level of doping driven by critical ferroelectric modes
• Multi-band theory of superconductivity at the LaAlO${}_3$/SrTiO${}_3$ interface
• Unconventional Bloch-Grüneisen scattering in hybrid Bose-Fermi systems
• Macroscopic description of the two-dimensional LaAlO${}_3$/SrTiO${}_3$ interface
• Anomalous transport near the Lifshitz transition at the LaAlO${}_3$/SrTiO${}_3$ interface
• Collapse of electrons to a donor cluster in SrTiO${}_3$
• Anomalous conductivity, Hall factor, magnetoresistance, and thermopower of accumulation layer in ${\text{SrTiO}}_3$
• Electron gas induced in SrTiO${}_3$
• Understanding the onset of negative electronic compressibility in one- and two-band 2D electron gases: Application to LaAlO${}_3$/SrTiO${}_3$
• Anomalous Thermodynamic Properties of Electron Accumulation Layer in SrTiO${}_3$
• Superconductivity from the Slater mode: Application to KTaO3 heterostructures
• Strange Metals from Quantum Geometric Fluctuations of Interfaces
• Three possible mechanisms of capacitance enhancement under magnetic field: charge density gradient modulation, electron gas excitation and oscillatory magnetization- polarization coupling