Carrier doping in anatase TiO_2 film by perovskite overlayer deposition

摘要

Heterostructures composed of perovskite overlayers on anatase TiO_2 films were fabricated on LaAlO_3 substrates. By depositing LaTiO_3 and LaAlO_3 thin films on the insulating anatase TiO_2 films, metallic conduction was induced in the anatase layer with the increasing thickness of the perovskite overlayer. This perovskite overlayer deposition on TiO_2 provides a method to induce free carriers, which may be applied to the development of transparent conducting oxides.