I have to model the VO2 device in Verilog A. But problem is that its I-V relation is very complexly related through temperature.
These two equations are solved simultaneously to find out relation between I and V of device shown in box . Vimt and Iimt is voltage and current across device . 
Rimt is resistance which is dependent on temperature as given curve . How to model VO2 while taking these complexities.