Dear sir, I understand what you have said. But how can I maintain translation symmetry ?because my system is 3D and for plotting current I access the sites of 3D system using *list(sys.sites) *and plot the current for 2D slice. Please suggest me.
Best Regards Naveen Yadav Research Scholar Department of Physics & Astrophysics University of Delhi New Delhi-110007 On Thu, May 7, 2020, 19:06 Abbout Adel <[email protected]> wrote: > 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 <[email protected]> > 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 >> > > > -- > Abbout Adel >
