Tunable superconductivity and its origin at KTaO3 interfaces

Abstract

A distinct dependence of the superconducting transition temperature on carrier density for electron gases formed at KTaO3 interfaces is reported. In addition, these interfaces are shown to play a role in mediating superconductivity in this system. The crystallographic orientation and carrier density dependent superconductivity at KTaO3 interfaces can be explained by Cooper pairing via inter-orbital interactions and quantum confinement.