Theory of Image Formation by Inelastically Scattered Electrons in the Electron Microscope

Kohl, Helmut; Rose, H.

doi:10.1016/s0065-2539(08)60878-1

Cited by 255 publications

(151 citation statements)

References 52 publications

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“…It can be seen that the width of the object function is decreased as the ionisation energy is increased. This is in agreement with the results of Kohl and Rose (Kohl and Rose 1985) where they have the effects of the probe profile as well as the object function. It can also be seen that increasing the size of the aperture for fixed ionisation energy will also reduce the width of the object functions.…”

Section: Circular Aperturessupporting

confidence: 92%

“…Figure 3 shows that as the aperture size is increased the large angle scattering contributes more so to the high Q regions of the object fuinctions in reciprocal space. As was pointed out by Kohl and Rose (Kohl and Rose 1985) this is because we are collecting the electrons that have passed closer to the nucleus and so are contributing the hiigh spatial resolution information to the object function. It can also be seen that this contribution is A striking result that comes from the use of annular apertures is the change in the 2-dependence of the FWHM of the object functions.…”

Section: Circular Aperturesmentioning

confidence: 99%

“…It may be possible to avoid this larger effective probe size if we could set up the experimental conditions to produce an object function with a smaller FWHM. A possible method to achieve this was indicated by Kohl and Rose (Kohl and Rose 1985) and explicitly outlined by Ritchie and Howie (Ritchie and Howie 1988).…”

Section: Introductionmentioning

confidence: 99%

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Towards atomic column-by-column spectroscopy

Rafferty

Pennycook

1999

Ultramicroscopy

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Section: Circular Aperturessupporting

confidence: 92%

Section: Circular Aperturesmentioning

confidence: 99%

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Towards atomic column-by-column spectroscopy

Rafferty

Pennycook

1999

Ultramicroscopy

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“…We apply a combination of two simulation software packages to calculate the effects of different channelling conditions on the measured Oxygen K-edge electron energy-loss spectra. The first program package uses the Bloch-wave formalism for treating elastic scattering (Löffler and Schattschneider, 2010), while it uses the mixed dynamic form factor (MDFF) (Kohl and Rose, 1985) to describe inelastic scattering events. The double differential scattering crosssection (DDSC) can be calculated as…”

Section: Simulationsmentioning

confidence: 99%

Site-specific ionisation edge fine-structure of Rutile in the electron microscope

Hetaba

Löffler

Willinger

et al. 2014

Micron

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Combined Bloch-wave and density functional theory simulations are performed to investigate the effects of different channelling conditions on the fine-structure of electron energy-loss spectra. The simulated spectra compare well with experiments. Furthermore, we demonstrate that using this technique, the site-specific investigation of atomic orbitals is possible. This opens new possibilities for chemical analyses.We used 2 simulation programs to calculate the site-specific fine-structure of Rutile.Comparing simulations and experiments the very good agreement is evident.We are able to study the influence of atomic orbitals using channelling effects. Highlights (for review)Site-specific ionisation edge fine-structure of Rutile in the electron microscope AbstractCombined Bloch-wave and density functional theory simulations are performed to investigate the effects of different channelling conditions on the fine-structure of electron energy-loss spectra. The simulated spectra compare well with experiments. Furthermore, we demonstrate that using this technique, the site-specific investigation of atomic orbitals is possible. This opens new possibilities for chemical analyses.

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“…(27b) J The dynamic form factor S is connected with the generalized dielectric function of the solid by (Kohl & Rose, 1985) oo S(q, q')= j" S(q, q', to) dw,…”

Section: Lo)mentioning

confidence: 99%

Electron virtual inelastic scattering in the multislice scheme

Wang¹

1990

Acta Cryst Sect A

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A multislice theory has been developed for including the virtual inelastic scattering in dynamical calculations of high-energy electron diffraction. The effects on elastic waves of all inelastic processes, such as single-electron excitation, plasmon excitation and phonon scattering, can be characterized by a complex correction potential. Its real part describes the virtual inelastic process and its imaginary part represents the inelastic absorption effect. This potential is directly related to the generalized dielectric response function of the crystal.

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Theory of Image Formation by Inelastically Scattered Electrons in the Electron Microscope

Cited by 255 publications

References 52 publications

Towards atomic column-by-column spectroscopy

Towards atomic column-by-column spectroscopy

Site-specific ionisation edge fine-structure of Rutile in the electron microscope

Electron virtual inelastic scattering in the multislice scheme

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