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dc.contributor.author
Török, Tímea Nóra
dc.contributor.author
Makk, Péter
dc.contributor.author
Balogh, Zoltán
dc.contributor.author
Csontos, Miklos
dc.contributor.author
Halbritter, András
dc.date.accessioned
2023-11-27T08:45:35Z
dc.date.available
2023-11-24T10:00:53Z
dc.date.available
2023-11-27T08:23:01Z
dc.date.available
2023-11-27T08:45:35Z
dc.date.issued
2023-11-24
dc.identifier.issn
2574-0970
dc.identifier.other
10.1021/acsanm.3c04769
en_US
dc.identifier.uri
http://hdl.handle.net/20.500.11850/643567
dc.identifier.doi
10.3929/ethz-b-000643567
dc.description.abstract
Filamentary resistive switching (RS) devices are not only considered as promising building blocks for brain-inspired computing architectures but also realize an unprecedented operation regime where the active device volume reaches truly atomic dimensions. Such atomically sized RS filaments represent the quantum transport regime, where the transmission eigenvalues of the conductance channels are considered a specific device fingerprint. Here, we gain insight into the quantum transmission properties of close-to-atomic-sized RS filaments formed across an insulating Ta2O5 layer through superconducting subgap spectroscopy. This method reveals the transmission density function of the open conduction channels contributing to the device’s conductance. Our analysis confirms the formation of truly atomic-sized filaments composed of 3–8 Ta atoms at their narrowest cross-section. We find that this diameter remains unchanged upon RS. Instead, the switching is governed by the redistribution of oxygen vacancies or tantalum cations within the filamentary volume. The set/reset process results in the reduction/formation of an extended barrier at the bottleneck of the filament, which enhances/reduces the transmission of the highly open conduction channels. This transmission variability facilitates neuromorphic electronic applications in nanosized artificial synapses reaching the ultimate atomic scale.
en_US
dc.format
application/pdf
en_US
dc.language.iso
en
en_US
dc.publisher
American Chemical Society
en_US
dc.rights.uri
http://creativecommons.org/licenses/by/4.0/
dc.subject
random matrix theory
en_US
dc.subject
superconducting subgap spectroscopy
en_US
dc.subject
resistive switching
en_US
dc.subject
memristor
en_US
dc.subject
tantalum oxide
en_US
dc.title
Quantum Transport Properties of Nanosized Ta₂O₅ Resistive Switches: Variable Transmission Atomic Synapses for Neuromorphic Electronics
en_US
dc.type
Journal Article
dc.rights.license
Creative Commons Attribution 4.0 International
dc.date.published
2023-11-15
ethz.journal.title
ACS Applied Nano Materials
ethz.journal.volume
6
en_US
ethz.journal.issue
22
en_US
ethz.journal.abbreviated
ACS Appl. Nano Mater.
ethz.pages.start
21340
en_US
ethz.pages.end
21349
en_US
ethz.version.deposit
publishedVersion
en_US
ethz.identifier.wos
ethz.identifier.scopus
ethz.publication.status
published
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02140 - Dep. Inf.technologie und Elektrotechnik / Dep. of Inform.Technol. Electrical Eng.::02635 - Institut für Elektromagnetische Felder / Electromagnetic Fields Laboratory
en_US
ethz.leitzahl
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02140 - Dep. Inf.technologie und Elektrotechnik / Dep. of Inform.Technol. Electrical Eng.::02635 - Institut für Elektromagnetische Felder / Electromagnetic Fields Laboratory::03974 - Leuthold, Juerg / Leuthold, Juerg
ethz.leitzahl.certified
ETH Zürich::00002 - ETH Zürich::00012 - Lehre und Forschung::00007 - Departemente::02140 - Dep. Inf.technologie und Elektrotechnik / Dep. of Inform.Technol. Electrical Eng.::02635 - Institut für Elektromagnetische Felder / Electromagnetic Fields Laboratory::03974 - Leuthold, Juerg / Leuthold, Juerg
ethz.date.deposited
2023-11-24T10:00:53Z
ethz.source
FORM
ethz.eth
yes
en_US
ethz.availability
Open access
en_US
ethz.rosetta.installDate
2023-11-27T08:45:36Z
ethz.rosetta.lastUpdated
2024-02-03T06:55:01Z
ethz.rosetta.versionExported
true
ethz.COinS
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