Sir, For .dc V2 0 0.5 1m temp -40 125 1 When I run plot v3#branch the following is output May I please know how I could interpret it or if there is some 3D plot or better way of doing it Thank you

You are drawing 166 curves. Try this:

.dc V2 0 0.5 1m temp -40 120 40

Thank you sir! Does the temperature increase as we move lower towards the right hand side x-axis

the X-axis is the V2 voltage. There are multiple curves, one per temperature. Which temperature each curve refers to is difficult to infer looking at the graph. Try to run simulations one temperature at a time so you see how current changes with temperature.

Thank you sir!