Hi Patrik, You can use site coordinates that don't belong to any lattice. For that you need to define your own SiteFamily, see for example the script below that achieves this goal.
------------------- from matplotlib import pyplot import kwant import tinyarray class Amorphous(kwant.builder.SimpleSiteFamily): def normalize_tag(self, tag): return tinyarray.array(tag, float) def pos(self, tag): return tag atoms = Amorphous() syst = kwant.Builder() sites = atoms(0.01, 0.05), atoms(1.01, -.5) syst[sites] = syst[sites] = 2 syst[sites, sites] = 1 kwant.plot(syst) --------------------- Of course it's now your responsibility to specify the Hamiltonian, leads, attaching leads, etc. Best, Anton On Thu, Jul 6, 2017 at 4:12 PM, Patrik Arvoy <arv...@gmail.com> wrote: > > Dear users and developers, > > I was wondering if I can import the coordinates of a scattering region > without any particular symmetry and compute the conductance via kwant. > If yes, how does one do that? > Let's say the scattering region does not have any symmetry after optimizing > the structure via MD or ... and I have a list of coordinates of all the > sites. > I appreciate any help. > > Regards > Patrik