Atomic structure of conducting nanofilaments in TiO2 resistive switching memory
Top Cited Papers
- 17 January 2010
- journal article
- Published by Springer Science and Business Media LLC in Nature Nanotechnology
- Vol. 5 (2), 148-153
- https://doi.org/10.1038/nnano.2009.456
Abstract
Resistance switching in metal oxides could form the basis for next-generation non-volatile memory. It has been argued that the current in the high-conductivity state of several technologically relevant oxide materials flows through localized filaments, but these filaments have been characterized only indirectly, limiting our understanding of the switching mechanism. Here, we use high-resolution transmission electron microscopy to probe directly the nanofilaments in a Pt/TiO(2)/Pt system during resistive switching. In situ current-voltage and low-temperature (approximately 130 K) conductivity measurements confirm that switching occurs by the formation and disruption of Ti(n)O(2n-1) (or so-called Magnéli phase) filaments. Knowledge of the composition, structure and dimensions of these filaments will provide a foundation for unravelling the full mechanism of resistance switching in oxide thin films, and help guide research into the stability and scalability of such films for applications.Keywords
This publication has 28 references indexed in Scilit:
- The conical shape filament growth model in unipolar resistance switching of TiO2 thin filmApplied Physics Letters, 2009
- Electrical Manipulation of Nanofilaments in Transition-Metal Oxides for Resistance-Based MemoryNano Letters, 2009
- Resistive switching in transition metal oxidesMaterials Today, 2008
- Memristive switching mechanism for metal/oxide/metal nanodevicesNature Nanotechnology, 2008
- The missing memristor foundNature, 2008
- Nanoionics-based resistive switching memoriesNature Materials, 2007
- Anode-interface localized filamentary mechanism in resistive switching of TiO2 thin filmsApplied Physics Letters, 2007
- Switching the electrical resistance of individual dislocations in single-crystalline SrTiO3Nature Materials, 2006
- Reproducible resistance switching in polycrystalline NiO filmsApplied Physics Letters, 2004
- Metal-insulator transitions insingle crystals: Crystal characterization, specific heat, and electron paramagnetic resonancePhysical Review B, 1976