Desorption of Potassium Atoms Stimulated by Electron Radiation of the K/KxAuy System

Energy Characteristics of Electron-Stimulated Desorption of Lithium Atoms from Lithium Layers on the Li-=SUB=-x-=/SUB=-Au-=SUB=-y-=/SUB=- Surface

“…Calculations of the electron structure of the goldalkali metal intermetallic compounds have confirmed the earlier experimental data [8][9][10][11][12]. However, transition from bulk samples to 2D-films demonstrated that the 2D-films of the K x Au y [13] and Na x Au y [4] intermetallic compounds produced at T = 300 K were semiconductors. Note that the Na x Au y intermetallic compound [15] produced at T ∼ 1000 K is a wide-bandgap semiconductor with the band gap of 2.7 eV.…”

“…When the dose of lithium atom deposition is below one monolayer, then no ESD of the Li atoms is observed and there is an adsorbed layer of the lithium atoms on the gold surface. Such an effect was also observed when depositing other atoms of the alkali metals to the surface of the gold [13,14,17,22]. Further increase in the dose of deposited lithium leads to occurrence of ESD of the Li atoms, thereby meaning the formation of the semiconductor 2D-layer of Li x Au y with x < y.…”

“…To explain the Li atoms' ESD process in the system of the Li/Li x Au y /Au/W, we will use the ideas proposed earlier [13]. Let us consider the process diagram by exemplifying it with excitation by the bombardment electrons of the Au 5p 3/2 level (Fig.…”

Effect of Sodium Atom Adsorption on the Electronic Structure of a Gold Film

“…This behavior is due to the fact that at E kin ∼ 110−120 eV the contribution from the surface becomes smaller than that from the near-surface region, but the contribution from the depth of the sample is also small. Thus, the comparison of previously obtained data on the formation of various intermetallides from Cs x Au y to Li x Au y [3,[16][17][18] during the deposition of AM atoms on the Au surface, together with the calculations of the NaAu [14] valence band with the experimental data obtained in this work, allows us to conclude that after the Na atoms deposition on the Au surface, the monolayer of Na atoms is formed, under which Na x Au y intermetallides of various stoichiometry are formed.…”