Hello Siesta community, I have observed in some of my calculations that there exists non-zero (even quite high) transmission values for the energy region that corresponds to the band gap of the semiconductor leads I use.
If I am not mistaken, the Green's Function G(E) of electrodes should vanish at the boundaries for that energy region, thus we shouldn't have any transmission. Besides, how can electrons transfer when they are not allowed or they are non-existent at a given energy in the leads? Has anyone else encountered this issue? Thanks in advance, Kemal Bagci
