Materials Physics of Electronic and Photonic Thin Films


Welcome to Professor Xi's group!

Our research focuses on the materials physics underlying the applications of oxide and boride thin films, in particular thin films at the nanoscale.

Metal oxides are a class of materials that have a wide variety of novel properties such as superconductivity, ferroelectricity, colossal magneto-resistivity, multiferroicity, etc. Similarly, borides display a variety of interesting magnetic, transport, and structural properties. We study fundamental electrical, optical, and magnetic properties of thin film metal oxides and borides and the effects of structural and interfacial properties on them. Since these properties depend critically on the crystallinity of the materials, fabrication of high quality epitaxial thin films is an important part of my research activities. In our lab, Pulsed Laser Deposition and Laser MBE are used to fabricate oxide thin films and heterostructures. We have developed a Hybrid Physical-Chemical Vapor Deposition (HPCVD) technique to deposit epitaxial magnesium diboride thin films for both basic research and electronics, high-field conductor, and RF cavity applications.