Electric Field Effect in LaTiO₃/SrTiO₃ Heterostructure

Abstract

We developed a technique to form conductive LaTiO 3 /SrTiO 3 interdiffusion layers with a sheet carrier density in the 10 13 cm -2 to 10 15 cm -2 range. An LaTiO 3 /SrTiO 3 heterostructure, which showed a field effect, was used as the conductive channel of a superconducting weak link. We also demonstrated that the heterostructure's field effect can be used to control its own electronic conduction characteristics, such as the mobility depth profile.