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@ARTICLE{Duchamp:827049,
author = {Duchamp, Martial and Migunov, Vadim and Tavabi, Amir
Hossein and Mehonic, A. and Buckwell, M. and Munde, M. and
Kenyon, A. J. and Dunin-Borkowski, Rafal},
title = {{I}n situ transmission electron microscopy of resistive
switching in thin silicon oxide layers},
journal = {Resolution and discovery},
volume = {1},
number = {1},
issn = {2498-8707},
address = {Budapest},
publisher = {Akadémiai Kiadó},
reportid = {FZJ-2017-01255},
pages = {27 - 33},
year = {2016},
abstract = {Silicon oxide-based resistive switching devices show great
potential for applications in nonvolatile random access
memories. We expose a device to voltages above hard
breakdown and show that hard oxide breakdown results in
mixing of the SiOx layer and the TiN lower contact layers.
We switch a similar device at sub-breakdown fields in situ
in the transmission electron microscope (TEM) using a
movable probe and study the diffusion mechanism that leads
to resistance switching. By recording bright-field (BF) TEM
movies while switching the device, we observe the creation
of a filament that is correlated with a change in
conductivity of the SiOx layer. We also examine a device
prepared on a microfabricated chip and show that variations
in electrostatic potential in the SiOx layer can be recorded
using off-axis electron holography as the sample is switched
in situ in the TEM. Taken together, the visualization of
compositional changes in ex situ stressed samples and the
simultaneous observation of BF TEM contrast variations, a
conductivity increase, and a potential drop across the
dielectric layer in in situ switched devices allow us to
conclude that nucleation of the electroforming—switching
process starts at the interface between the SiOx layer and
the lower contact.},
cin = {PGI-5 / ER-C-1},
ddc = {600},
cid = {I:(DE-Juel1)PGI-5-20110106 / I:(DE-Juel1)ER-C-1-20170209},
pnm = {143 - Controlling Configuration-Based Phenomena (POF3-143)},
pid = {G:(DE-HGF)POF3-143},
typ = {PUB:(DE-HGF)16},
doi = {10.1556/2051.2016.00036},
url = {https://juser.fz-juelich.de/record/827049},
}