Saldin Research Group

Direct Method for Low Energy Electron Diffraction


We have developed a solution to the multiple-scattering inverse problem for low-energy electron diffraction that enables the determination of the three-dimensional atomic structure of an entire surface unit cell directly from measured data. The solution requires a knowledge of the structure of the underlying bulk crystal and is implemented by an algorithm that alternately satisfies constraints in real and reciprocal space.

References:

"Solution of a Multiple-Scattering Inverse Problem: Electron Diffraction from Surfaces", D. K. Saldin, A. Seubert, and K. Heinz, Phys. Rev. Lett. 88, art. no. 115507 (2002).

"Direct Determination by Low Energy Electron Diffraction of the Atomic Structure of Surface Layers on a Known Substrate" , A. Seubert, K. Heinz, and D. K. Saldin, Phys. Rev. B 67, art. no. 25417 (2003).

"Holographic Surface Crystallography: Substrate as Reference", R. J. Harder and D. K. Saldin, Handbook on Solid State Photoemission and Electron Diffraction, edited by M. A. Van Hove and W. Schattke (Wiley-VCH, Weinheim, 2003).

"Direct Methods for Surface Crystallography" , D. K. Saldin and V. L. Shneerson, submitted to the special issue of J. Phys.: Condens. Matter in honor of Prof. Sir John Pendry, F.R.S.


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