Comparison between experiment and calculated band structures for DyN and SmN

Department of Physics, Case Western Reserve University, Cleveland, Ohio 44106-7079, USA(Dated: March 20, 2008)We investigate the electronic band structure of two of the rare-earth nitrides, DyN and SmN.Resistivity measurements imply that both materials have a semiconducting ground state, and bothshow resistivity anomalies coinciding with the magnetic transition, despite the different magneticstates in DyN and SmN. X-ray absorption and emission measurements are in excellent agreementwith densities of states obtained from LSDA+U calculations, although for SmN the calculationspredict a zero band gap.