hi, everybody.
I calculate the I-V characteristic using the method as follow:
1. calculate the current under zero bias and get the zerobias.nc
2. calculate the current under a high bias such as 4 Voltage and get the 4voltage.nc using the date of zerobias.nc.
3. then the bias descrease in the step of 0.5 Voltage. serials valence of current under different bias can be got using the date of 4voltage.nc as the initial data. I find that the convergence can be quickly attained.
so, I don't sure the results of current is precise? can anybody give a some suggestion?