STEMSIM—a New Software Tool for Simulation of STEM HAADF Z-Contrast Imaging

Abstract

Summary: Z-contrast high-angle annular dark field image intensities were computed for ZnS and InSb. We compare results obtained by the frozen phonon approximation with a thermal diffuse scattering (TDS) absorptive potential method. We find that the TDS absorptive potential approach in the local approximation deviates by less than 4 % from the frozen phonon approximation. Finally, we suggest a method to use absorptive potentials in the local approximation for computing the contribution from TDS to the image intensity in conventional parallel illumination mode.

Compositional characterization of GaAs/GaAsSb nanowires by quantitative HAADF-STEM

“…Simulations were performed with the STEMsim software (Rosenauer and Schowalter, 2008), based on the frozen-lattice multislice method. For each Sb concentration x ∈ {0, 0.1, 0.2, 0.3} in ZB GaAs 1−x Sb x , 15 supercells with different statistical distributions of Sb and As atoms, different thermal displacements, as well as different SAD were generated.…”

Experimental Evidence for Oxygen Sublattice Control in Polar Infinite LayerSrCuO2

“…The image simulations [inset in Fig. 4] are obtained using STEMSIM [19] and considering a supercell consisting of 5 Â 5 unit-cells with a total of 180 Â 180 pixels. Polarized XA spectra were acquired at beam line 4.0.2 at the Advanced Light Source in total electron yield mode by monitoring the sample drain current.…”

On the role of inelastic scattering in phase-plate transmission electron microscopy

“…The contribution of inelastic phonon scattering to TEM images is analyzed by frozen-lattice simulations using the STEMsim software [23].…”