TY  - JOUR
AU  - Rotunno, E.
AU  - Tavabi, A. H.
AU  - Yucelen, E.
AU  - Frabboni, S.
AU  - Dunin-Borkowski, Rafal
AU  - Karimi, E.
AU  - McMorran, B. J.
AU  - Grillo, V.
TI  - Electron-Beam Shaping in the Transmission Electron Microscope: Control of Electron-Beam Propagation Along Atomic Columns
JO  - Physical review applied
VL  - 11
IS  - 4
SN  - 2331-7019
CY  - College Park, Md. [u.a.]
PB  - American Physical Society
M1  - FZJ-2020-02666
SP  - 044072
PY  - 2019
AB  - We present a detailed analysis of the propagation of high-energy electron beams that have different shapes in a crystal of [100]-oriented zincblende GaN. Our study primarily focuses on Bessel beams and makes use of reformulated Bloch wave and multislice simulations. As a result of the simplicity of the momentum spectrum of a Bessel beam and the symmetry of the crystal, its propagation in the material can be described in a free-space representation, providing a deeper understanding of channeling phenomena and of probe intensity oscillation in the propagation direction. We also consider aperture-limited and Gaussian beams. The latter probes are shown to be optimal for coupling to 1s Bloch states and achieving minimal spreading along atomic columns.
LB  - PUB:(DE-HGF)16
UR  - <Go to ISI:>//WOS:000465185900006
DO  - DOI:10.1103/PhysRevApplied.11.044072
UR  - https://juser.fz-juelich.de/record/878153
ER  -