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- W2014665855 abstract "• The self-assembly of Cs and Ba adatoms adsorbed on ultrathin Ag (1 1 1) films is investigated, which is different from thick films adsorption. • The reduction of substrate's thickness results in small adatoms separation, which means the tendency of island formation. • The surface-state mediated interaction is modulated by films thickness drastically; however, the dipole–dipole repulsive interaction is not affected by films thickness. • The influence of surface state electron induced by Ba and Cs adatoms is similar for thick substrates and different for ultrathin substrate. Through first-principles investigation, we display the formation process of Shockley-type surface states which emerges on silver thin films along Ag (1 1 1) orientation with increasing thicknesses from 6 to 21 layers. We look at the surface state band for various adatoms adsorbed on 6, 12, 18 layers strained Ag (1 1 1) films with different coverage, and discuss the long range interaction mediated by surface state electrons. We discovered that film's thickness can modulate the surface state mediated interaction drastically, but the dipole–dipole repulsive interaction is not affected by slab thickness. This factor had never been discussed in detail. Therefore, adatoms adsorbed on thin films have strong attractive interaction which leads to small adsorption separation and the tendency of island formation. For different coverage or different adsorbate types, both surface states and dipole moment are modulated. The three factors, film's thickness, adsorbate coverage and adatoms types, could help us learn more about the interactions between adatoms and exploit advanced ways to control surface geometry structures of self-assembly." @default.
- W2014665855 created "2016-06-24" @default.
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- W2014665855 date "2014-01-01" @default.
- W2014665855 modified "2023-09-25" @default.
- W2014665855 title "The inter-adsorbate interaction mediated by Shockley-type surface state electrons and dipole moment: Cs and Ba atoms absorbed on Ag (111) films" @default.
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- W2014665855 doi "https://doi.org/10.1016/j.apsusc.2013.10.103" @default.
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