Local effect of Na adsorption on Cu(111)

H− survival probability during collisions with Na/Cu(111)

“…In the past, we have successfully applied this LDA potential in several contexts, such as: (1) to study local effects due to Na adsorbtion on Cu(111) [27]; (2) to study channeling effects during H − ion scattering on Cu(111) [28]; and (3) to study solid defects [29]. The electron-surface potential has the following expression:…”

“…We choose this particular coverage because, as shown in our previous studies, the Na atoms are adsorbed at the three-fold fcc site with an adsorption height of 5.2 a.u. [20,27]. We perform the calculations under the following assumptions: (1) In order to maximize the RCT effects, the H − ions collide directly with Na atoms.…”

“…As shown in our previous studies, the Na atoms are adsorbed at the three-fold fcc site with an adsorption height of 5.2 a.u. [20,27]. In both theoretical calculations and experiment, the projectile is approaching the Na/Cu(111) surface with an energy of 2 keV, and at a fixed incidence angle of 30°measured from surface.…”

“…This will lead to different electron capture/loss rates along those directions and different ion survival probabilities. In our recent work [27], we have discussed the local effects induced by the Na atoms adsorbed on Cu(111), including the formation of hybrid bonds between Na and its Cu neighbors on surface. In order to understand in more detail the relation between the surface direction and the survival probability, in this section we are particularly focusing on the effect played by the bond between the Na atom and the Cu atoms along the different surface directions.…”

Ion bombardment of Ni(110) studied with inverse photoemission spectroscopy and low-energy electron diffraction

“…Also of interest, for fundamental understanding as well as for development of technologies on controlled systems which more closely approximate real-life surfaces, investigations into defects and adsorbed species at surfaces have been studied extensively [7] [8] [9] [10] [11] [12] [13] [14].…”