Figure 1

Electron hologram together with holographically reconstructed phase and amplitude images of an individual BTO NC where the $c$ axis lies in plane (see Fig. S3 in Ref. 41). (a) is the electron hologram. (b) and (c) are the amplitude image and the corresponding profile along the marked stripe, respectively. (d) is the phase image. (e) and (f) are the corresponding phase change profiles along the marked stripes in (d). (g) displays the equiphase contour plot on the phase image.Reuse & Permissions

Figure 2

Phase images of a BTO NC below and above the Curie temperature. (a) and (b) are the phase and amplitude images, respectively, at RT. The phase image is color scaled to emphasize the change of phase (see text for further explanation). The inset in (a) displays a low-magnification image of the BTO NC under inspection marked by a dashed circle. This image is rotated with respect to the hologram due to different lens conditions. (c) and (d) display the corresponding phase and amplitude profiles, respectively, taken along line scans “i” and “ii” from (a) and (b) below $T_C$. (e) and (f) are the phase and amplitude images, respectively, of the same BTO nanocrystal above $T_C$ (142 °C) on the same scale. (g) and (h) display the corresponding phase and amplitude profiles, respectively, taken along line scans “i” and “ii” from (e) and (f) above $T_C$.Reuse & Permissions