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@ARTICLE{Moors:826347,
author = {Moors, Marco and Adepalli, Kiran Kumar and Lu, Qiyang and
Wedig, Anja and Bäumer, Christoph and Skaja, Katharina and
Arndt, Benedikt and Tuller, Harry Louis and Dittmann, Regina
and Yildiz, Bilge and Valov, Ilia and Waser, R.},
title = {{R}esistive {S}witching {M}echanisms on {T}a{O}$_{x}$ and
{S}r{R}u{O}$_{3}$ {T}hin-{F}ilm {S}urfaces {P}robed by
{S}canning {T}unneling {M}icroscopy},
journal = {ACS nano},
volume = {10},
number = {1},
issn = {1936-086X},
address = {Washington, DC},
publisher = {Soc.},
reportid = {FZJ-2017-00575},
pages = {1481 - 1492},
year = {2016},
abstract = {The local electronic properties of tantalum oxide (TaOx, 2
≤ x ≤ 2.5) and strontium ruthenate (SrRuO3) thin-film
surfaces were studied under the influence of electric fields
induced by a scanning tunneling microscope (STM) tip. The
switching between different redox states in both oxides is
achieved without the need for physical electrical contact by
controlling the magnitude and polarity of the applied
voltage between the STM tip and the sample surface. We
demonstrate for TaOx films that two switching mechanisms
operate. Reduced tantalum oxide shows resistive switching
due to the formation of metallic Ta, but partial oxidation
of the samples changes the switching mechanism to one
mediated mainly by oxygen vacancies. For SrRuO3, we found
that the switching mechanism depends on the polarity of the
applied voltage and involves formation, annihilation, and
migration of oxygen vacancies. Although TaOx and SrRuO3
differ significantly in their electronic and structural
properties, the resistive switching mechanisms could be
elaborated based on STM measurements, proving the general
capability of this method for studying resistive switching
phenomena in different classes of transition metal oxides.},
cin = {PGI-7},
ddc = {540},
cid = {I:(DE-Juel1)PGI-7-20110106},
pnm = {521 - Controlling Electron Charge-Based Phenomena
(POF3-521)},
pid = {G:(DE-HGF)POF3-521},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000369115800166},
pubmed = {pmid:26738414},
doi = {10.1021/acsnano.5b07020},
url = {https://juser.fz-juelich.de/record/826347},
}