Hi, Is it possible to calculate the band structure of a 3D geometry which is only periodic in 1 or 2 dimensions? (i.e. for example a hexagonal lattice of holes in a slab of a given thickness or a fixed number of layers of a 3D crystal.)
Or is it necessary to use a 3D lattice with a basis3 vector much longer than the thickness of the structure, i.e. a sort of supercell?
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