Enhanced stability of filament-type resistive switching by interface engineering

Area of Science:

• Materials Science
• Electrical Engineering
• Nanotechnology

Background:

• Resistive switching devices are crucial for memory applications.
• Filament rupture and joule heating degrade device performance, particularly endurance and uniformity.

Purpose of the Study:

• To suppress undesirable filament rupture in resistive switching devices.
• To enhance the endurance and uniformity of Al/TaO_x/ITO devices through interface engineering.

Main Methods:

• Interface engineering by introducing a thin NiO_x layer into Al/TaO_x/ITO devices.
• Analyzing the confinement of filament formation and rupture under critical bias.
• Investigating the conduction mechanisms (space-charge-limited and Schottky emission).

Main Results:

• The NiO_x/TaO_x interface effectively confines filament formation and rupture.
• Improved endurance and uniformity of the resistive switching devices were observed.
• Space-charge-limited conduction dominates the SET process, while Schottky emission governs reverse bias behavior.

Conclusions:

• Interface engineering with NiO_x is a viable strategy to enhance resistive switching device performance.
• The developed method offers a pathway to more robust and reliable non-volatile memory technologies.