Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Holographic convergent electron beam diffraction (CBED) imaging of
  two-dimensional crystals   Convergent beam electron diffraction (CBED) performed on two-dimensional (2D)
materials recently emerged as a powerful tool to study structural and stacking
defects, adsorbates, atomic 3D displacements in the layers, and the interlayer
distances. The formation of the interference patterns in individual CBED spots
of 2D crystals can be considered as a hologram, thus the CBED patterns can be
directly reconstructed by conventional reconstruction methods adapted from
holography. In this study, we review recent results applying CBED to 2D
crystals and their heterostructures: holographic CBED on bilayers with the
reconstruction of defects and the determination of interlayer distance, CBED on
2D crystal monolayers to reveal adsorbates, and CBED on multilayered van der
Waals systems with moir\'e patterns for local structural determination.

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The categories of this paper are: nucl-th
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The categories of this paper are: math
16
The categories of this paper are: stat
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
5
The categories of this paper are: gr-qc
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The categories of this paper are: eess
8
The categories of this paper are: hep-ex
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The categories of this paper are: acc-phys
32
The categories of this paper are: atom-ph
6
The categories of this paper are: astro-ph
0
The categories of this paper are: hep-ph
1
The categories of this paper are: cs
28
The categories of this paper are: alg-geom
36
The categories of this paper are: cmp-lg