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Holographic Atom Imaging from Experimental Photoelectron Angular Distribution Patterns

Published online by Cambridge University Press:  21 February 2011

L. J. Terminello,
D. A. Lapiano-Smith,
J. J. Barton,
B. L. Petersen and
D. A. Shirley
L. J. Terminello
Affiliation:
Lawrence Livermore National Laboratory, M/S L-357, Livermore, CA 94550
D. A. Lapiano-Smith
Affiliation:
IBM T. J. Watson Research Center, Yorktown Heights, NY 10598
J. J. Barton
Affiliation:
IBM T. J. Watson Research Center, Yorktown Heights, NY 10598
B. L. Petersen
Affiliation:
Lawrence Berkeley Laboratory, M/S 2-300, 1 Cyclotron Rd. Berkeley, CA 94720
D. A. Shirley
Affiliation:
Pennsylvania State University, Kern Graduate Building, University Park, PA 16802
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Abstract

One of the most challenging areas of materials research is the imaging of technologically relevant materials with microscopic and atomic-scale resolution. As part of the development of these methods, near-surface atoms in single crystals were imaged using core-level photoelectron holograms. The angle-dependent electron diffraction patterns that constitute an electron hologram were two-dimensionally transformed to create a three dimensional, realspace image of the neighboring scattering atoms. We have made use of a multiplewavenumber, phased-summing method to improve the atom imaging capabilities of experimental photoelectron holography using the Cu(001) and Pt(111) prototype systems. These studies are performed to evaluate the potential of holographic atom imaging methods as structural probes of unknown materials.

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References

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