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Electric Field Effect in LaTiO3/SrTiO3 Heterostructure

We developed a technique to form conductive LaTiO3/SrTiO3 interdiffusion layers with a sheet carrier density in the 1013 cm-2 to 1015 cm-2 range. An LaTiO3/SrTiO3 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.