Figure 1
From: In Situ Atom Scale Visualization of Domain Wall Dynamics in VO2 Insulator-Metal Phase Transition
Domain wall dynamics.
(a), Schematic illustration of domain wall dynamics in VO2 insulator-metal phase transition (from monoclinic (M) phase to rutile (R) phase) for the atom scale tunable heterostructure. The red and gray spheres represent O and V atoms, respectively. (b), A series of in situ HRTEM images with corresponding fast Fourier transformation (FFT) images at temperature of 25, 50, 55, 60and70°C (from images 1 to 5) show domain wall dynamics in VO2 insulator-metal phase transition. (c), Energy band diagrams of rutile and monoclinic VO2 before formation of domain walls. (d), Schematic energy band change diagram for tunable heterostructure, where DM and DR are widths of monoclinic (M) and rutile (R) domains. In (b) scale bars are 10 nm.
