LAUSR

Abstract Recently, advances in creating complex oxide heterostructures in atomic scale and research on special properties appears at the interfaces between two different transition-metal oxides, have promoted a new era of materials and physics research. At the heterointerface, unexpected properties could be detected which does not exist in the bulk. Two-dimensional electron gas (2DEG) at the oxide heterointerface between two insulating dielectric perovskite oxides, LaAlO 3 and SrTiO 3 , has attracted tremendous attention with the metallic conductivity at the interface since its discovery in 2004. Intensive experimental and theoretical studies have showed that 2DEG at the oxide heterointerface exhibits a vast diversity of novel properties including superconductivity, ferromagnetism, and field induced metal-insulator phase transitions. In this review, the origin and important factors of 2DEG at the oxide heterointerface and the way to manipulate this interfacial system will be discussed.