Valence band circular dichroism in non-magnetic Ag/Ru(0001) at normal emission



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Mascaraque Susunaga, Arantzazu and Mentes, T. Onur and McCarty, Kevin F and Marcos, José and Schmid, Andreas K. and Locatelli, Andrea and Figuera, Juan de la (2011) Valence band circular dichroism in non-magnetic Ag/Ru(0001) at normal emission. Journal of Physics: Condensed Mater, 23 (30). ISSN 0953-8984

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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.

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© Institute of Physics
This research was supported by the U.S. Department of Energy under contracts No. DEAC04-94AL85000 and DE-AC02-05CH11231 and by the Spanish Ministry of Science and Innovation under Projects No. MAT2009-14578-C03-01 and No. FIS2007-64982.

Uncontrolled Keywords:Dependent photoemission intensities, Continuous absorption, Magnetic dichroism, Molecules, Ru(0001), Region, Films, Au, Ag
Subjects:Sciences > Physics > Materials
ID Code:28246
Deposited On:16 Feb 2015 10:59
Last Modified:16 Feb 2015 10:59

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