Dear All,<br />
     There are inbuilt crystal lattices in Kwant. As little bit crazy I tried to use <br />
general( ) in constructing monatomic square or rectangular lattice instead of using <br />
lattice.square(). My code was:<br />
lat=kwant.lattice.general([(1,0),(0,1)],[(0,0)])instead of the inbuilt square <br />
lattice i.e. lat=kwant.lattice.square(1).<br />
Error given : polyatomic objects are not callable. <br />
I cant understand how this becomes polyatomic? I have not declared any sublattice.<br />
Please help me how to give a code for manatomic and polyatomic objects as well.<br />
Thanks to all of the discuss forum.<br />
K.K.Ghosh<br />
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