 A distinct dependence of the superconducting transition temperature on carrier density for electron gases formed at KtIo3 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 KtIo3 interfaces can be explained by Cooper pairing via interorbital interactions and quantum confinement. This article was authored by Changiang Liu, Zhang Jingzhu, Desheng Hong, and others.