Oncel, NuriCakir, DenizDil, J. HugoSlomski, BartoszLandolt, Gabriel2015-06-232015-06-232015-06-23201410.1088/0953-8984/26/28/285501https://infoscience.epfl.ch/handle/20.500.14299/115341WOS:000338830300019The physical and electronic properties of the Ir modified Si(1 1 1) surface have been investigated with the help of angle resolved photoemission spectroscopy and density functional theory. The surface consists of Ir-ring clusters that form a root 7 x root 7 -R19.1 degrees reconstruction. A comparison between the measured and calculated band structure of the system reveals that the dispersions of the projected bulk states and the states originating from `1x1' domains are heavily modified due to Umklapp scattering from the surface Brillouin zone. Density of states calculations show that Ir-ring clusters contribute to the states in the vicinity of the Fermi level.text::journal::journal article::research article