研究目的
To summarize the recent progress in the optical response of two-dimensional electron gas (2DEG) at SrTiO3-based heterointerfaces, focusing on the photoresponsive properties and their potential applications in novel all-oxide optical devices.
研究成果
The review concludes that the tunable photoresponsive properties at LaAlO3/SrTiO3 interfaces offer significant potential for the development of all-oxide photoelectric devices. It emphasizes the advantages of complex oxides over traditional semiconductors due to their multifunctionality and couplings, such as ferroelectricity, ferromagnetism, and superconductivity. The review also identifies open questions regarding the origin of 2DEG and the spin polarity in these systems, suggesting directions for future research.
研究不足
The review highlights the complexity of the photoresponsive mechanisms at SrTiO3-based heterointerfaces and the challenges in fully understanding the role of defects, such as oxygen vacancies, and the effects of surface and interface modifications. It also points out the need for further research to explore the differences in photoresponsive properties among various 2DEG systems and to realize practical applications of oxide optoelectronics.
