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Effect of spin-orbit coupling on atomic-like and delocalized quantum well states in Au overlayers on W(110) and Mo(110)

AuthorsShikin, Alexander M.; Rybkina, Anna A.; Rusinova, M. V.; Klimovskikh, Ilya I.; Rybkin, Artem G.; Zhizhin, E. V.; Chulkov, Eugene V. ; Krasovskii, E. E.
Issue Date2013
PublisherInstitute of Physics Publishing
CitationNew Journal of Physics 15: 125014 (2013)
AbstractThe spin structure of quantum well states (QWSs) in three-monolayer-thick gold overlayers on W(110) and Mo(110) is studied experimentally by spin- and angle-resolved photoelectron spectroscopy and theoretically by ab initio calculations. The spin–orbit coupling effects manifest themselves differently in the spin structure of atomic-like d and delocalized sp QWSs depending on how strongly the states are influenced by the substrate. The QWSs of a d character show a strong spin polarization with an almost identical structure for W(110) and Mo(110), suggesting a weak interaction with the substrate, whereas for sp QWSs, the interaction is much stronger, which to a large extent determines their splitting and spin polarization. The theoretical model yields a qualitative agreement with the experiment and explains the observed behavior.
DescriptionContent from this work may be used under the terms of the Creative Commons Attribution 3.0 licence.
Publisher version (URL)http://dx.doi.org/10.1088/1367-2630/15/12/125014
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