Phase-shift correction in three-dimensional imaging using foward-scattering photoemission and Auger spectoscopies
- 7 January 1991
- journal article
- research article
- Published by American Physical Society (APS) in Physical Review Letters
- Vol. 66 (1) , 60-63
- https://doi.org/10.1103/physrevlett.66.60
Abstract
We invert high-energy (E≥400 eV) photoelectron and Auger-electron interference patterns to construct 3D images of surface and interface atoms. A new scheme is introduced to correct the phase shift of the image. Image reconstruction is demonstrated for Si(111) √3 × √3 -B, a system in which multiple-scattering effects are small and all source waves are equivalent. Using diffraction results from multiple-scattering slab calculations, we achieve a spatial resolution of 1.0–1.3 Å, thus qualifying the technique as a direct structural tool.Keywords
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