Electrical polarization in AlN/GaN nanodisks measured by momentum-resolved 4D scanning transmission electron microscopy

K Müller-Caspary, T Grieb, J Müßener, N Gauquelin… - Physical review …, 2019 - APS
We report the mapping of polarization-induced internal electric fields in AlN/GaN nanowire
heterostructures at unit cell resolution as a key for the correlation of optical and structural …

Extended Charge Layers in Metal-Oxide-Semiconductor Nanocapacitors Revealed by Operando Electron Holography

C Gatel, R Serra, K Gruel, A Masseboeuf, L Chapuis… - Physical Review Letters, 2022 - APS
The metal-oxide-semiconductor (MOS) capacitor is one of the fundamental electrical
components used in integrated circuits. While much effort is currently being made to …

Electron holography on HfO2/HfO2− x bilayer structures with multilevel resistive switching properties

G Niu, MA Schubert, SU Sharath, P Zaumseil… - …, 2017 - iopscience.iop.org
Unveiling the physical nature of the oxygen-deficient conductive filaments (CFs) that are
responsible for the resistive switching of the HfO 2-based resistive random access memory …

Towards quantitative electrostatic potential mapping of working semiconductor devices using off-axis electron holography

S Yazdi, T Kasama, M Beleggia, MS Yekta… - Ultramicroscopy, 2015 - Elsevier
Pronounced improvements in the understanding of semiconductor device performance are
expected if electrostatic potential distributions can be measured quantitatively and reliably …

4D-STEM at interfaces to GaN: Centre-of-mass approach & NBED-disc detection

T Grieb, FF Krause, K Müller-Caspary, R Ritz… - Ultramicroscopy, 2021 - Elsevier
Abstract 4D-scanning transmission electron microscopy (4D-STEM) can be used to measure
electric fields such as atomic fields or polarization-induced electric fields in crystal …

Three-dimensional measurement of Mg dopant distribution and electrical activity in GaN by correlative atom probe tomography and off-axis electron holography

L Amichi, I Mouton, E Di Russo, V Boureau… - Journal of Applied …, 2020 - pubs.aip.org
The distribution and electrical activity of p-type doping (Mg) in gallium nitride (GaN) grown
by metal organic chemical vapor deposition was investigated by correlating atom probe …

Mapping electric fields in real nanodevices by operando electron holography

M Brodovoi, K Gruel, A Masseboeuf, L Chapuis… - Applied Physics …, 2022 - pubs.aip.org
Nanoelectronic devices play an essential role in many domains, and their development and
improvement attract considerable attention in fundamental and applied research. Access to …

Electron holography

RE Dunin-Borkowski, A Kovács, T Kasama… - Springer Handbook of …, 2019 - Springer
Electron holography is a powerful technique that allows the phase shift of a high-energy
electron wave that has passed through a specimen in the transmission electron microscope …

Precise measurement of electric potential, field, and charge density profiles across a biased GaAs pn tunnel junction by in situ phase-shifting electron holography

S Anada, K Yamamoto, H Sasaki, N Shibata… - Journal of Applied …, 2017 - pubs.aip.org
We combined an in situ biasing technique with phase-shifting electron holography, which
can simultaneously achieve a high precision and high spatial resolution, to measure the …

Highly spatially resolved mapping of the piezoelectric potentials in InGaN quantum well structures by off-axis electron holography

V Boureau, D Cooper - Journal of Applied Physics, 2020 - pubs.aip.org
The internal fields in 2.2 nm thick InGaN quantum wells in a GaN LED structure have been
investigated by using aberration-corrected off-axis electron holography with a spatial …