Electrical oscillations induced by the metal-insulator transition in VO2

摘要: We systematically investigate the characteristics of an electrical oscillation observed in two-terminal vanadium dioxide (VO2) devices. These oscillations are at room temperature a simple circuit without inductive components. The is composed only dc voltage source, VO2 device, and standard resistor connected series with device. explain why result percolative metal-to-insulator transition (MIT) coexistence metal insulating phases. Specifically, attributed to construction destruction capacitive regions semiconducting phase, (as dielectric material) metallic phase electron carriers, induced by MIT capacitor electrodes). Since these phases—and thus regions—is destroyed elevated temperature, not explained terms significant heat input but rather voltag...