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 …

[HTML][HTML] Measuring electrical properties in semiconductor devices by pixelated STEM and off-axis electron holography (or convergent beams vs. plane waves).

D Cooper, L Bruas, M Bryan, V Boureau - Micron, 2024 - Elsevier
We demonstrate the use of both pixelated differential phase contrast (DPC) scanning
transmission electron microscopy (STEM) and off-axis electron holography (EH) for the …

Three-dimensional distribution of individual atoms in the channels of beryl

D Knez, C Gspan, N Šimić, S Mitsche, H Fitzek… - Communications …, 2024 - nature.com
Single atom detection in nanoporous materials is a significant challenge, particularly due to
their sensitivity to electron irradiation. Here, natural beryl (Be3Al2Si6O18) is used as a …

Towards the interpretation of a shift of the central beam in nano-beam electron diffraction as a change in mean inner potential

C Mahr, T Grieb, FF Krause, M Schowalter… - Ultramicroscopy, 2022 - Elsevier
The measurement of electric fields in scanning transmission electron microscopy (STEM) is
a highly investigated field of research. The constant improvement of spatial resolution in …

Composition determination of semiconductor alloys towards atomic accuracy by HAADF-STEM

L Duschek, P Kükelhan, A Beyer, S Firoozabadi… - Ultramicroscopy, 2019 - Elsevier
This paper presents a comprehensive investigation of an extended method to determine
composition of materials by scanning transmission electron microscopy (STEM) high angle …

Wet-chemical etching of FIB lift-out TEM lamellae for damage-free analysis of 3-D nanostructures

EM Turner, KR Sapkota, C Hatem, P Lu, GT Wang… - Ultramicroscopy, 2020 - Elsevier
Reducing ion beam damage from the focused ion beam (FIB) during fabrication of cross
sections is a well-known challenge for materials characterization, especially cross sectional …

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 …

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 …

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 …

Atomic-scale measurement of polar entropy

D Mukherjee, S Prokhorenko, L Miao, K Wang… - Physical Review B, 2019 - APS
Entropy is a fundamental thermodynamic quantity that is a measure of the accessible
microstates available to a system, with the stability of a system determined by the magnitude …