Table 1 Comparative analysis of the models
From: A Collective Study on Modeling and Simulation of Resistive Random Access Memory
Model | Device type | State variable | Control mechanism | Threshold exists | Supports boundary effects | Simulation compatible |
---|---|---|---|---|---|---|
Generic | Flux or charge | Current | NA | NA | NA | |
Linear ion drift [3] | Bipolar | 0 ≤ w ≤ D Doped region physical width | Current | No | External window functions | Possible with SPICE |
Bipolar | 0 ≤ w ≤ 1 Doped region normalized width | Voltage | No | External window functions | No | |
Exponential [69] | Bipolar | Switching speed | Voltage | No | Yes | No |
Bipolar | aoff ≤ w ≤ aon Undoped region width | Current | No | No | SPICE | |
Bipolar | 0 ≤ w ≤ 1 Not explained physically | Voltage | Yes | External window functions | SPICE/Verilog/MAPP | |
Bipolar | xon ≤ x ≤ xoff Undoped region width | Current | Current | Implicit window functions | SPICE/Verilog/MAPP | |
VTEAM [77] | Bipolar | xon ≤ x ≤ xoff Undoped region width | Voltage | Voltage | Implicit window functions | SPICE/Verilog/MAPP |
Bipolar | Filament gap (g) | Voltage | Temperature | No | SPICE/Verilog/MAPP | |
Unipolar | Concentration of ions | Voltage | Temperature | No | COMSOL | |
Physical electro thermal [87] | Bipolar | Concentration of ions | Voltage | Temperature | Practically yes | COMSOL |
Bocquet unipolar [90] | Unipolar | Concentration of ions | Voltage | Temperature | Yes | COMSOL/SPICE |
Bipolar | CF radius | Voltage | Temperature | Yes | SPICE | |
Gonzalez-Cordero [93] | Bipolar | CF radius (top and bottom) | Voltage | Temperature | Yes | SPICE |