leegun...@inu.ac.kr wrote:

> Error says 'Polyatomic' object is not callable.
>
> I did a search
> lat = kwant.lattice.general([[1, 0], [1/2, np.sqrt(3)/2]], # lattice vectors
>                                   [[0, 0], [0, 1/np.sqrt(3)]]) # Coordinates 
> of the sites
> a, b = lat. sublattices
>   I understand that this code is polyatomic, and it is not correct to apply 
> it to (lat(x, y).
>
> But i can't find a solution. Can you help me?

Hi, please have a look at the Kwant tutorial on graphene [1].  It
demonstrates how to work with polyatomic lattices.

Christoph

[1] https://kwant-project.org/doc/1/tutorial/graphene

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