Electronic structure and Fermi surface of Ru(0001) and Ru(1 0 (1)over-bar 0) measured with high-resolution angle-resolved photoemission

We study the Fermi surface and the band structure of Ru(0 0 0 1) and, for the first time, Ru(1 0 (1) over bar 0) by high-resolution angle-resolved photoemission spectroscopy using He I-alpha and He II alpha radiation for excitation. The experimental results, though consistent with published data, show several features that were not observed previously. Theoretical calculations done in the framework of the density functional theory and the experimental data allows to derive detailed information,about the momentum-resolved electronic structure. Our results can be used as a reference base to understand the chemical and catalytic properties of Ru surfaces. (C) 2013 Elsevier B.V. All rights reserved.