Quantitative characterization of nanometer-scale electric fields via momentum-resolved STEM

A Beyer, MS Munde, S Firoozabadi, D Heimes… - Nano …, 2021 - ACS Publications
Most of today's electronic devices, like solar cells and batteries, are based on nanometer-
scale built-in electric fields. Accordingly, characterization of fields at such small scales has …

Influence of plasmon excitations on atomic-resolution quantitative 4D scanning transmission electron microscopy

A Beyer, FF Krause, HL Robert, S Firoozabadi… - Scientific reports, 2020 - nature.com
Scanning transmission electron microscopy (STEM) allows to gain quantitative information
on the atomic-scale structure and composition of materials, satisfying one of todays major …

Effects of Electron Microscope Parameters and Sample Thickness on High Angle Annular Dark Field Imaging

P Yang, Z Li, Y Yang, R Li, L Qin, Y Zou - Scanning, 2022 - Wiley Online Library
Scanning transmission electron microscopy (STEM) developed into a very important
characterization tool for atomic analysis of crystalline specimens. High‐angle annular dark …

Ingrained: An automated framework for fusing atomic‐scale image simulations into experiments

E Schwenker, VSC Kolluru, J Guo, R Zhang, X Hu, Q Li… - Small, 2022 - Wiley Online Library
To fully leverage the power of image simulation to corroborate and explain patterns and
structures in atomic resolution microscopy, an initial correspondence between the simulation …

Segregation at interfaces in (GaIn) As/Ga (AsSb)/(GaIn) As-quantum well heterostructures explored by atomic resolution STEM

P Kükelhan, S Firoozabadi, A Beyer, L Duschek… - Journal of Crystal …, 2019 - Elsevier
Surface segregation and interaction effects of In and Sb in (GaIn) As/Ga (AsSb)/(GaIn) As-
“W”-type quantum well heterostructures (“W”-QWHs) are investigated by high angle annular …

Angle-resolved STEM using an iris aperture: Scattering contributions and sources of error for the quantitative analysis in Si

T Grieb, FF Krause, K Müller-Caspary, S Firoozabadi… - Ultramicroscopy, 2021 - Elsevier
The angle-resolved electron scattering is investigated in scanning-transmission electron
microscopy (STEM) using a motorised iris aperture placed above a conventional annular …

Element specific atom counting for heterogeneous nanostructures: Combining multiple ADF STEM images for simultaneous thickness and composition determination

DG Şentürk, A De Backer, S Van Aert - Ultramicroscopy, 2024 - Elsevier
In this paper, a methodology is presented to count the number of atoms in heterogeneous
nanoparticles based on the combination of multiple annular dark field scanning transmission …

Ge/SiGe parabolic quantum wells

A Ballabio, J Frigerio, S Firoozabadi… - Journal of Physics D …, 2019 - iopscience.iop.org
Quantum wells with parabolic confining potentials allow the realization of semiconductor
heterostructures mimicking the physical properties of a quantum harmonic oscillator. Here …

Angle-dependence of ADF-STEM intensities for chemical analysis of InGaN/GaN

T Grieb, FF Krause, K Müller-Caspary, JP Ahl… - Ultramicroscopy, 2022 - Elsevier
In this paper we perform angular resolved annular-dark field (ADF) scanning-transmission
electron microscopy (STEM) to study the scattered intensity in an InGaN layer buried in GaN …

A Small Step for Epitaxy, a Large Step Toward Twist Angle Control in 2D Heterostructures

O Maßmeyer, J Belz, BO Dogahe… - Advanced Materials …, 2024 - Wiley Online Library
Abstract 2D materials have received a lot of interest over the past decade. Especially van
der Waals (vdW) 2D materials, such as transition metal dichalcogenides (TMDCs), and their …