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oai:docta.ucm.es:20.500.14352/444622023-08-28T20:03:13Zcom_20.500.14352_14col_20.500.14352_15

00925njm 22002777a 4500 dc Mascaraque Susunaga, Arantzazu author Mentes, T. Onur author McCarty, Kevin F author Marcos, José author Schmid, Andreas K. author Locatelli, Andrea author Figuera, Juan de la author 2011-08-03 For the non-magnetic system of Ag films on Ru(0001), we have measured the circular dichroism of photoelectrons emitted along the surface normal, the geometry typically used in photoemission electron microscopy. Photoemission spectra were acquired from micrometer-sized regions having uniformly thick Ag films on a single, atomically flat Ru terrace. For a single Ag layer, we find a circular dichroism that exceeds 6% at the d-derived band region around 4.5 eV binding energy. The dichroism decreases as the Ag film thickness increases to three atomic layers. We discuss the origin of the circular dichroism in terms of the symmetry lowering that can occur even in normal emission. 0953-8984 10.1088/0953-8984/23/30/305006 https://hdl.handle.net/20.500.14352/44462 http://dx.doi.org/10.1088/0953-8984/23/30/305006 http://iopscience.iop.org http://arxiv.org/abs/1301.4354 Valence band circular dichroism in non-magnetic Ag/Ru(0001) at normal emission