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@ARTICLE{Funck:851660,
author = {Funck, Carsten and Marchewka, Astrid and Bäumer, Christoph
and Schmidt, Peter C. and Müller, Phillip and Dittmann,
Regina and Martin, Manfred and Waser, R. and Menzel,
Stephan},
title = {{A} {T}heoretical and {E}xperimental {V}iew on the
{T}emperature {D}ependence of the {E}lectronic {C}onduction
through a {S}chottky {B}arrier in a {R}esistively
{S}witching {S}r{T}i{O} 3 -{B}ased {M}emory {C}ell},
journal = {Advanced electronic materials},
volume = {4},
number = {7},
issn = {2199-160X},
address = {Chichester},
publisher = {Wiley},
reportid = {FZJ-2018-05210},
pages = {1800062 -},
year = {2018},
abstract = {Metal–semiconductor Schottky interfaces are of high
interest in many fields of semiconductor physics. One type
of electronic devices based on Schottky contacts are
resistive switching cells. The mostly applied analytical
models are insufficient to describe all Schottky contact
systems, which further impedes finding the correct
conduction mechanism and may lead to physical
misunderstandings. In this work, the electron transport
properties of the resistively switching SrTiO3/Pt interface
model system are investigated using a combination of
experimental and theoretical methods.
Temperature‐dependent I–V curves are measured and
analyzed using an analytical approach, an atomistic approach
based on density functional theory and the nonequilibrium
Green's function formalism, and a continuum modeling
approach. The findings suggest two different conduction
mechanisms. Instead of a current transport over the barrier,
as in the case of Schottky emission theory, the simulations
show that tunneling through the Schottky barrier dominates.
In the low voltage range, only thermally excited electrons
can tunnel into the conduction band. For higher voltages,
the SrTiO3 conduction band and the Fermi level at the
injecting Pt‐electrode are aligned, allowing also
electrons at the Fermi‐edge to tunnel. Consequently, the
temperature dependence changes, leading to a crossing of the
I–V curves at different temperatures.},
cin = {PGI-7 / JARA-FIT / JARA-HPC},
ddc = {621.3},
cid = {I:(DE-Juel1)PGI-7-20110106 / $I:(DE-82)080009_20140620$ /
$I:(DE-82)080012_20140620$},
pnm = {521 - Controlling Electron Charge-Based Phenomena
(POF3-521) / Modelling the Valency Change Memory Effect in
Resistive Switching Random Access Memory (RRAM)
$(jpgi70_20120501)$},
pid = {G:(DE-HGF)POF3-521 / $G:(DE-Juel1)jpgi70_20120501$},
typ = {PUB:(DE-HGF)16},
UT = {WOS:000437828700005},
doi = {10.1002/aelm.201800062},
url = {https://juser.fz-juelich.de/record/851660},
}