Figure 2
The simulated and experimentally determined RHEED patterns for VO2 on c-Al2O3(0001) and VO2 on TiO2(001). For VO2 on c-Al2O3(0001): Simulated and experimental RHEED patterns of VO2 azimuthal rotations and for the two phases. (a) The left two images are simulations of the 0° rotation for the monoclinic phase of VO2; the top image denotes the 2-D lattice planes for the streak patterns while the bottom image has streaks highlighted. The right image is the experimentally determined RHEED pattern the highlighted streaks correspond to the simulated image. This plot orientation is maintained for (b) as well where the simulated images are shown at left and experimental images at right. (b) The 0°/90° rotation for the rutile phase of VO2. (c) The experimentally determined RHEED patterns for the 0° degree rotation through the thermal IMT where the image on the left is prior to transition and the image on the right is post transition. For VO2 on TiO2(001): (f) The top leftmost two images are simulations of the 0° rotation for the monoclinic phase (left) and rutile phase (right) of VO2. The bottom left image is a superimposed image of both simulated images. The right image is the experimentally determined RHEED pattern for VO2 on TiO2(001) where the highlighted streaks correspond to the simulated images. (e) The left top image is the simulation and right top and bottom images experimental patterns for VO2 grown on TiO2(001); the 0° rotation is right and 90° is bottom. (f) The experimentally determined RHEED patterns for the 0° degree rotation through the thermal IMT where the image on the left is prior to transition and the image on the right is post transition. (Note: All images have been rotated 45 degrees and the contrast has been increased for ease of streak identification).
