Jacob's ladder of approximations to paraxial dynamic electron scattering
2015 (English)In: Physical Review B. Condensed Matter and Materials Physics, ISSN 1098-0121, E-ISSN 1550-235X, Vol. 92, no 23, 235114Article in journal (Refereed) PublishedText
Dynamical scattering theory describes the dominant scattering process of beam electrons at targets in the transmission electron microscope (TEM). Hence, practically every quantitative TEM study has to consider its ramifications, typically by some approximate modeling. Here, we elaborate on a hierarchy within the various approximations focusing on the two principal approaches used in practice, Bloch wave and multislice. We reveal characteristic differences in the capability of these methods to reproduce the correct local propagation of the wave function, while convergent results are obtained over larger propagation distances. We investigate the dependency of local variations of the wave function on the atomic number of the atomic scatterers and discuss their significance for, e.g., inelastic scattering.
Place, publisher, year, edition, pages
2015. Vol. 92, no 23, 235114
IdentifiersURN: urn:nbn:se:uu:diva-272069DOI: 10.1103/PhysRevB.92.235114ISI: 000366086300007OAI: oai:DiVA.org:uu-272069DiVA: diva2:892898
FunderEU, FP7, Seventh Framework Programme, 312483 - ESTEEM2Swedish Research CouncilGöran Gustafsson Foundation for Research in Natural Sciences and MedicineThe Swedish Foundation for International Cooperation in Research and Higher Education (STINT)