Poster: Polar Dielectrics, Optics, and Ionics

Nanosession: Ionics - Redox Kinetics, Ion Transport, and Interfaces

Nanosession: Valence Change Memories - A Look Inside

Valence change ReRAMs (VCM) - Experiments and modelling: General discussion

Valence change ReRAMs (VCM) - Experiments and modelling: General discussion

Spectroscopic study of the electric field induced valence change of Fe-defect centers in SrTiO(3)

The electrochemical changes induced by an electric field in Fe-doped SrTiO(3) have been investigated by X-ray absorption spectroscopy (XANES and EXAFS), electron paramagnetic resonance (EPR) and Raman spectroscopy. A detailed study of the Fe dopant in the regions around the anode and cathode reveals new insights into the local structure and valence state of Fe in SrTiO(3) single crystals. The ab initio full multiple-scattering XANES calculations give an evidence of the oxygen vacancy presence in the first coordination shell of iron. Differences in the length and disorder of the Fe-O bonds as extracted from EXAFS are correlated to the unequivocal identification of the defect type by compleme…

Electrochemical metallization ReRAMs (ECM) - Experiments and modelling: general discussion

Electrochemical metallization ReRAMs (ECM) - Experiments and modelling: General discussion

Electrochemical Tantalum Oxide for Resistive Switching Memories

Redox-based resistive switching memories (ReRAMs) are strongest candidates for the next-generation nonvolatile memories fulfilling the criteria for fast, energy efficient, and scalable green IT. These types of devices can also be used for selector elements, alternative logic circuits and computing, and memristive and neuromorphic operations. ReRAMs are composed of metal/solid electrolyte/metal junctions in which the solid electrolyte is typically a metal oxide or multilayer oxides structures. Here, this study offers an effective and cheap electrochemical approach to fabricate Ta/Ta2O5-based devices by anodizing. This method allows to grow high-quality and dense oxide thin films onto a metal…