Effect of electrode and oxide properties on the filament kinetics during electroforming in metal-oxide-based memories
QA76.75-76.765
0103 physical sciences
TA401-492
Computer software
02 engineering and technology
0210 nano-technology
Materials of engineering and construction. Mechanics of materials
01 natural sciences
DOI:
10.1038/s41524-022-00770-2
Publication Date:
2022-04-21T10:03:06Z
AUTHORS (4)
ABSTRACT
AbstractWe developed a physical model to fundamentally understand the conductive filament (CF) formation and growth behavior in the switching layer during electroforming process in the metal-oxide-based resistive random-access memories (RRAM). The effects of the electrode and oxide layer properties on the CF morphology evolution, current-voltage characteristic, local temperature, and electrical potential distribution have been systematically explored. It is found that choosing active electrodes with lower oxygen vacancy formation energy and oxides with small Lorenz number (ratio of thermal and electrical conductivity) enables CF formation at a smaller electroforming voltage and creates a CF with more homogeneous morphology. This work advances our understanding of the kinetic behaviors of the CF formation and growth during the electroforming process and could potentially guide the oxide and electrode materials selection to realize a more stable and functional RRAM.
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