Abstract
The filament in aAu/Ta2O5/Au system is analyzed and determined to be a nanoscaled TaO2-x filament. A shrunken anode localizes the filament formation and the defect boundary leads to faster accumulation of oxygen vacancies. The defect changes the switching domination between electron transport and oxygen-vacancy migration. The migration of oxygen vacancies limits the filament dynamics, indicating the crucial role played by oxygen defects.
Original language | English |
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Pages (from-to) | 5028-5033 |
Number of pages | 6 |
Journal | Advanced Materials |
Volume | 27 |
Issue number | 34 |
DOIs | |
State | Published - 1 Sep 2015 |
Keywords
- in situ TEM
- memristors
- nanofilaments
- resistive switching
- valence change memories (VCM)