Polarization effects in electron scattering from ion cores in solids
- 15 June 1976
- journal article
- Published by American Physical Society (APS) in Physical Review B
- Vol. 13 (12) , 5170-5178
- https://doi.org/10.1103/physrevb.13.5170
Abstract
In current theories of x-ray absorption fine structure (EXAFS) and of low-energy electron diffraction, the elastic scattering of the photoelectrons from the ion cores in a solid is treated as the scattering from a static potential. We consider the effects of virtual excitation processes and discuss under which circumstances the polarization of the ion cores by the scattered electron are important. A complex energy-dependent optical potential is derived and a set of complex phase shifts are calculated with parameters appropriate for copper metal. Implications for the theory of EXAFS are discussed. DOI: http://dx.doi.org/10.1103/PhysRevB.13.5170 © 1976 The American Physical SocietyKeywords
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