Hi Rohit,

Is this code correct for the voltage applied in the 3rd lead?

I briefly looked at your code and you seem to be calculating the scattering matrix for a stadium with 3 leads attached, except two of the leads are 1 site wide and overlap. I am almost 100% sure this is not what you intended, given the surrounding code. If you provide a bit more context about what you're trying to accomplish, any maybe ask a more focused question you're more likely to get a useful response. Happy Kwanting, Joe