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Volume 5, Issue 5 Res. Rev. J Mat. Sci. 2017
ISSN: 2321-6212 Advanced Materials 2017
September 07-08, 2017
September 07-08, 2017 | Edinburgh, Scotland
Advanced materials & Processing
11th International Conference on
Resistive switching in highly disordered thin oxide films
Manfred Martin1, Yoshitaka Aoki1,2 , Philipp Hein1 and Alexandra von der Heiden1
1RWTH Aachen University, Germany
2Hokkaido University, Japan
In thin films of mixed ionic electronic conductors sandwiched by two ion-blocking electrodes, the homogeneous migration of ions
and their polarization will modify the electronic carrier distribution across the conductor, thereby enabling homogeneous resistive
switching. Here we report non-filamentary memristive switching based on the bulk oxide ion conductivity of amorphous GaOx
(x~1.1) thin films. We directly observe reversible enrichment and depletion of oxygen ions at the blocking electrodes responding to
the bias polarity by using photoemission and transmission electron microscopies, proving that oxygen ion mobility causes memristive
behavior. The shape of the Hysteresis I-V curves are tunable by the bias history, as found in the mathematically derived memristor
model. This dynamical behavior can be attributed to the coupled ion drift and diffusion motion and the oxygen concentration profile
acting as a state function of the memristor. Further examples will be discussed.
Biography
Manfred Martin is Professor and Head of the Institute of Physical Chemistry of RWTH Aachen University, Germany. At Seoul National University, Korea he was
WCU Professor and is now Adjunct Professor. He has more than 30 years of experience in education and research of physical chemistry of solids as well as service
at department, faculty and university level. His current research focusses on materials for energy conversion, resistive switching, solid-state reactions, secondary
ion mass spectrometry, and computer simulations as well. Professor Manfred Martin has published >200 scientific papers in international, refereed journals. He
received the Carl-Wagner Award and has been elected as member of the Royal Society of Chemistry. He has supervised more than 50 Ph.D. students and more
than 20 postdoctoral fellows.
Manfred Martin et al., Res. Rev. J Mat. Sci. 2017, 5:5
DOI: 10.4172/2321-6212-C1-005