Hi Eleni,
It's a hard problem, and usually we reduce reflection by creating a smooth interface between the scattering region and the contact. As far as measuring the quality of such interface goes, I think the most practical approach is to replace the scattering region with another lead with dispersion mimicking that of the scattering region as closely as possible.
Best, Anton
On Sun, Apr 22, 2018 at 12:13 PM, elchatz@auth.gr wrote:
Hello everyone,
I have defined two semi-infinite contacts in my system as follows:
def lead_shape(p): x, y, z = p return -10 < x < 10 and -6 < y < 6 and 0 < z < 30
sym_lead = kwant.TranslationalSymmetry(lattice.vec((-6, 0, 0))) lead = kwant.Builder(sym_lead) lead[lattice.shape(lead_shape, (0, 0, 15))] = 0
Is there an easy way to calculate any reflections from the lead back into the conductor? I mean, ideally, I would like all electrons entering the contacts to stay there.
Regards
Eleni
-- Dr. Eleni Chatzikyriakou Computational Physics lab Aristotle University of Thessaloniki elchatz@auth.gr - tel:+30 2310 998109