The most powerful experimental tool for verifying the validity of electronic structure models is ARPES. This technique is able to resolve the electronic structure in three-dimensional momentum, k. The surface-parallel momentum, k xy , is varied through the photoelectron emission angle (ϑ), whereas the surface-perpendicular component, k z , is varied through the photon energy (hv ) (see, for example, ). The PBE+U(BO) results for ZnTe are verified by comparison with the ARPES data for ZnTe (110) reported in Ref. Often, ARPES experiments are compared to bulk band structure calculations. However, bulk band structures cannot capture surface and interface phenomena, which require technically more demanding slab calculations. Here, the ZnTe (110) surface is simulated using a slab model, shown in Figure . The supercell extends over 50 unit layers in the surface-perpendicular direction and includes an additional vacuum region. Such supercell models produce band structures that appear as a dense manifold ("spaghetti") of bands as a function of k xy , shown in the SI.