Dear Naveen,
What you get is what is expected. You do not have translational symmetry. Rewrite your code by keeping only two dimensions and you will see why.
I hope this helps, Adel
On Thu, May 7, 2020 at 12:52 PM Naveen Yadav naveengunwal72@gmail.com wrote:
Dear KWANT Developers, I am trying to plot the current density. The procedure is straightforward. I have attached leads to the scattering region (leads have same onsite and hopping as of the scattering region) as
*sys[(lat(z,y,x) for z in range(H) for y in range(W)for x in range(L))]=onsitesys[kwant.builder.HoppingKind((1, 0, 0), lat, lat)] = hoppingzsys[kwant.builder.HoppingKind((0, 1, 0), lat, lat)] = hoppingysys[kwant.builder.HoppingKind((0, 0, 1), lat, lat)] = hoppingxlead=kwant.Builder(kwant.TranslationalSymmetry((1,0,0)))lead[(lat(z,y,x) for z in range(H) for y in range(W)for x in range(L))]=onsitelead[kwant.builder.HoppingKind((1, 0, 0), lat, lat)] = hoppingzlead[kwant.builder.HoppingKind((0, 1, 0), lat, lat)] = hoppingylead[kwant.builder.HoppingKind((0, 0, 1), lat, lat)] = hoppingxsys.attach_lead(lead, add_cells=80)sys.attach_lead(lead.reversed())* [image: image.png] As you can see from the plot there is a discontinuity in the plot at (W=20). Why it is so even if the scattering region and leads have same onsite and hopping and there is translation symmetry throughout ?
-- Best Regards, Naveen Yadav Research Scholar Department of Physics & Astrophysics University Of Delhi New Delhi-110007
