Addressing Coulomb's singularity, nanoparticle recoil and Johnson's noise

Electron Microscopy and Analysis Group Conference 2013

Howie, Archie^1

Cavendish Laboratory, University of Cambridge, J J Thomson Avenue, Cambridge CB3 0HE, United Kingdom^1

关键词: Atomic scattering;    Beam interactions;    Coherence effects;    Dielectric theory;    Inelastic electron scattering;    Phase-shift analysis;    Single atoms;    Thermal fluctuations;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/522/1/012001/pdf
DOI  :  10.1088/1742-6596/522/1/012001

来源: IOP

【 摘 要 】

Recent experiments prompt rethinking of the basics of elastic and inelastic electron scattering in electron microscopy. Standard approximations of elastic scattering largely based Bragg's law seem less clearly relevant when individual columns or even single atoms are probed. Phase shift analysis of atomic scattering can provide some checks and insights. The dielectric theory of aloof beam interactions is severely tested by observations of nanoparticle recoil but may be capable of explaining de-coherence effects induced by thermal fluctuations.