Comparative studies of electrically driven metal insulator transition in VO$_{2}$ single crystal and thin film

Electrically driven metal-insulator transition (MIT) characteristics of VO$_{2}$ single domain crystal and thin-film were investigated by temperature and external bias voltage dependent electrical transport, optical microscopy, and synchrotron-based polychromatic x-ray micro-diffraction measurements. Our results suggest that electrically driven metallic state of VO$_{2}$ is similar to that of temperature driven metallic state. However, after the electrically driven MIT, VO$_{2}$ single crystal exhibits metallic and insulating colors on the surface of the crystals simultaneously. In addition, the origin of electrically driven MIT of crystals seems different from that of electrically driven MIT films. In this talk, we will present comparative studies of electrically driven MIT of VO$_{2}$ single crystal and thin-film, and discuss the origins of electrically driven MIT and its implications.