################# Magnetic solids ################# The band structure of a ferromagnetic solid. The whole chain fans out over the two spin channels, so the input carries a set of Wannier projections for each of them alongside the total magnetization, and you get a band structure per channel at the end. Ferromagnets only, for the moment: an antiferromagnet needs its two magnetic sublattices started antiparallel, and a structure whose sublattices are inequivalent cannot yet be written in an input file — `issue #74 `_ tracks that gap. .. note:: This tutorial has not been written yet. It is tracked by `issue #76 `_.