Electronic structure of the charge-density-wave compound Er5Ir4Si10

Photoemission and x-ray absorption measurements have been performed on Er5Ir4Si10, a compound that exhibits an incommensurate charge-density-wave formation below 155 K. The resonant photoemission and x-ray absorption measurements performed across the Er N54 and Er M5 edge identify the Er 4f multiplet lines, the 4f occupancy and the character of the states close to the Fermi edge.