Wisconsin Alumni Research Foundation

Other

Daesu Lee

Chang-Beom Eom

Zhenqiang Ma

Dong Liu

Sang June Cho

Jaeseong Lee

Heterostructures that include a bilayer composed of epitaxial layers of vanadium dioxide having different rutile-to-monoclinic phase transition temperatures are provided. Also provided are electrical switches that incorporate the heterostructures. The bilayers are characterized in that they undergo a single-step, collective, metal-insulator transition at an electronic transition temperature. At temperatures below the electronic transition temperature, the layer of vanadium dioxide having the higher rutile-to-monoclinic phase transition temperature has an insulating monoclinic crystalline phase, which is converted to a metallic monoclinic crystalline phase at temperatures above the electronic transition temperature.

Vanadium dioxide heterostructures having an isostructural metal-insulator transition

Switches for electromagnetic radiation, including radiofrequency switches and optical switches, are provided. Also provided are methods of using the switches. The switches incorporate layers of high quality VOthat are composed of a plurality of connected crystalline VOdomains having the same crystal structure and orientation.

Vanadium dioxide-based optical and radiofrequency switches

Layers of high quality VOand methods of fabricating the layers of VOare provided. The layers are composed of a plurality of connected crystalline VOdomains having the same crystal structure and the same epitaxial orientation.

High quality vanadium dioxide films

Layered oxide structures comprising an overlayer of high quality VOand methods of fabricating the layered oxide structures are provided. Also provided are high-speed switches comprising the layered structures and methods of operating the high-speed switches. The layered oxide structures include high quality VOepitaxial films on isostructural SnOgrowth templates.

Growing community of inventors

Madison, WI, United States of America

Daesu Lee