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Figure 1
Schematic of the displacement and its gradient. (a) A schematic representation of a displacement field inside a crystal (blue) with respect to an unperturbed crystal lattice (gray). The momentum transfer Q is parallel to the y-axis, and the experiment is insensitive to the vertical crystal planes (dashed lines). (b) The 2D displacement field uy(x,y) in false color, typically directly extracted from BCDI data through phase retrieval. We chose the field such that the normal strain ∂uy/∂y = 0. (c) The displacement gradient ∂uy/∂x in the direction perpendicular to Q clearly shows the bending of the planes visible in (a). In (b) and (c) the x and y coordinates are identical to those in (a).

Journal logoJOURNAL OF
SYNCHROTRON
RADIATION
ISSN: 1600-5775
Volume 29| Part 3| May 2022| Pages 866-870
https://doi.org/10.1107/S1600577522002363
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