Title :
Effects of a Load Resistor on Conducting Filament Characteristics and Unipolar Resistive Switching Behaviors in a Pt/NiO/Pt Structure
Author :
Hwang, Inrok ; Lee, Myung-Jae ; Bae, Jieun ; Hong, Sahwan ; Kim, Jin-Soo ; Choi, Jinsik ; Deng, Xiao Long ; Ahn, Seung-Eon ; Kang, Sung-Oong ; Park, Bae Ho
Author_Institution :
Dept. of Phys., Konkuk Univ., Seoul, South Korea
fDate :
6/1/2012 12:00:00 AM
Abstract :
With a simply modified circuit design connecting a Pt/NiO/Pt capacitor to a serial load resistor (RL), resistive switching (RS) characteristics are significantly improved. Distributions of current at low-resistance state and switching voltages during reset and set processes are much reduced, and RS endurance is much enhanced. Using percolation theory, we find that a multiply connected conducting filament (CF) is preferentially formed in a Pt/NiO/Pt capacitor serially connected to an RL of 1 kΩ. The multiply connected CF may provide uniform heat distribution to a Pt/NiO/Pt capacitor, resulting in reduced randomness during heat-assisted reset process and improved RS characteristics.
Keywords :
capacitors; random-access storage; resistors; Pt-NiO-Pt; capacitor; conducting filament; current distributions; heat distribution; heat-assisted reset; load resistor effects; low-resistance state; percolation theory; resistance 1 kohm; serial load resistor; switching voltages; unipolar resistive switching; Capacitors; Current measurement; Heating; Integrated circuits; Resistance; Resistors; Switches; Conducting filament (CF); load resistor; nonvolatile memory; resistive random-access memory (ReRAM);
Journal_Title :
Electron Device Letters, IEEE
DOI :
10.1109/LED.2012.2190259
