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Project B2(E):
(2011 - 2015)

Electrocoloration: The electroformation process made visible

We propose to study the physical and chemical nature of the electroforming process, which is essential to obtain bipolar resistive switching in transition metal oxide-based valence change memory materials. During this process, a "virtual cathode", visible via the electrocoloration effect, is formed which propagates through the crystal and acts as the counter-electrode for resistive switching. The interplay of randomly distributed point defects and extended defects during this process is still completely unknown. The project comprises the growth of high quality acceptor doped SrTiO3 single crystals, structural and defect analysis, defect control, electrical, optical and spectroscopic characterization and will lead to a better understanding of the electroforming process.

Principal investigators:

Prof. Dr. G. Roth
Institut für Kristallographie
RWTH Aachen University
Phone: +49 (0)241 80 96913
E-mail: roth@xtal.rwth-aachen.de

Prof. Dr.-Ing. R. Waser
Institut für Werkstoffe der Elektrotechnik 2
RWTH Aachen University
Phone: +49 (0)241 80 27812
E-mail: waser@iwe.rwth-aachen.de

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