Hi Siesta users, I have a question regarding convergence of phonon calculation with respect to k-mesh.
Suppose for an 8 atom (1x1x1x8) Si supercell Monkhrast k-mesh required is 16x16x16 for Gamma point phonons. If I now double the size of the supercell in one of the axial directions and have 16 atoms (2x1x1x8) how would the k-mesh be resolved for this larger supercell? To get the k-mesh denser like for the case of 8-atom supercell, we would need to use 8x16x16; but would it be necessary to use such equivalent dense mesh or due to the increase of the supercell size we can use less denser k-mesh, say, 8x8x4? Thanks in advance, -- Sophia
