Experimental tight-binding parameterization of the oxygen-metal interaction: application to the Rh(1 1 0)(2 × 2)p2mg-O surface

The Rh(1 1 0)(2 × 2)p2mg-O surface has been studied by ARUPS utilizing linearly polarized HeI and synchrotron radiations. To make an electronic band structure map of the O2p states, p-polarized 100 eV synchrotron radiation is used. This photon energy is selected as the Cooper minimum of the Rh4d states to give a relatively higher cross-section of O2p state. Apart from this, tight-binding calculations of this system is made, in which Rh4d, 5s, 5p and O2p states are included as the basis set, and the Slater–Koster parameters of Rh–O interaction are used as fitting parameters. With these calculations, the experimentally obtained electronic structure of the Rh(1 1 0)(2 × 2)p2mg-O surface is successfully interpreted.