Electronic structure of an antiferromagnetic chromium layer adsorbed on the (001) silver surface

The electronic structure of a chromium layer adsorbed on the silver (001) surface is calculated in the tight-binding approximation. The ground state is found for a c(2×{}2) antiferromagnetic structure with a magnetic moment close to 3.6 Bohr magnetons. The two-dimensional energy-dispersion curves are also calculated for a nine-layer slab as a function of the wave vector parallel to the surface. The overall agreement with the experimental values measured by angle-resolved photoemission is not convincing enough to confirm that a chromium monolayer can be deposited on a silver (100) substrate.