Journal article

Theory of dynamical scattering in near-edge electron energy loss spectroscopy

C Witte, SD Findlay, MP Oxley, JJ Rehr, LJ Allen

PHYSICAL REVIEW B | AMER PHYSICAL SOC | Published : 2009

Abstract

Beyond chemical information, the fine structure of an absorption edge gives bonding and electronic information. We provide a synthesis of fine structure and dynamical scattering theory, allowing the exploration of the effects of dynamical scattering on the measured fine structure. We discuss the effects of experimental geometry in the context of site-specific near-edge spectroscopy of NiAl2 O4 and find that large detectors serve to localize the inelastic signal and may be preferable to the small off-axis detectors currently used. We then explore the possibility of measuring changes in fine structure within a unit cell using scanning transmission electron microscopy. We demonstrate that, in p..

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University of Melbourne Researchers

Grants

Awarded by Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, U. S. Department of Energ


Awarded by Grants-in-Aid for Scientific Research


Funding Acknowledgements

The authors would like to thank Z. Levine, K. Jorissen, and A. Sorini for helpful discussions from their independent explorations of generalizing the FEFF code for the calculation of MDFFs. L.J.A. acknowledges support from the Australian Research Council. S. D. F. is supported by the Japan Society for the Promotion of Science (JSPS). This research was sponsored by the Office of Basic Energy Sciences, Division of Materials Sciences and Engineering, U. S. Department of Energy, under Contract No. DE-AC05-00OR22725 with Oak Ridge National Laboratory, managed and operated by UT-Battelle, LLC.