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

A M Shikin, A A Rybkina, M V Rusinova, I I Klimovskikh, A G Rybkin, E V Zhizhin, E V Chulkov, E E Krasovskii
2013 New Journal of Physics  
The spin structure of quantum well states (QWSs) in threemonolayer-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
more » ... lmost 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.
doi:10.1088/1367-2630/15/12/125014 fatcat:2p6rf4z77barlj4mfy5waqewyu