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Christian Lenser, Marten Patt, Stephan Menzel, Annemarie Köhl, Carsten Wiemann, Claus M. Schneider, Rainer Waser and Regina Dittmann Insights into Nanoscale Electrochemical Reduction in a Memristive Oxide: the Role of Three-Phase Boundaries Advanced Functional Materials 24

Version of Record online: 19 APR 2014 | DOI: 10.1002/adfm.201304233

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The three-phase boundary between electrode, oxide and ambient is shown to play a crucial role for the electroreduction in resistively switchable devices fabricated from Fe-doped SrTiO3. Nanoscale chemical mapping by X-ray photoemission electron microscopy, combined with simulated temperature profiles of the filaments, provide evidence that localized Joule heating at the electrode edge is essential for the formation of conducting filaments.

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