Energy characteristics of electron-stimulated desorption of lithium atoms from lithium layers on the Li$_x$Au$_y$ surface

The formation of 2D Li$_x$Au$_y$ semiconductor layers on the surface of gold deposited on a tungsten substrate has been studied. The processes of electron-stimulated desorption of Li atoms in the Li/Li$_x$Au$_y$/Au/W system are considered. The presence of two peaks in the kinetic energy distribution of desorbed lithium atoms is shown: a high energy peak at an energy of 0.3 eV and a low energy peak at an energy of 0.11 eV. The high energy peak is associated with the desorption of lithium atoms from the adsorbed lithium layers, and the low energy peak is associated with the Li$_x$Au$_y$ intermetallic compound. The influence of the number of deposited gold and lithium atoms on the process of formation of 2D semiconductor Li$_x$Au$_y$ layers is studied. It is shown that the processes of electron-stimulated desorption occur in the Li monolayer and the Li$_x$Au$_y$ layer closest to it. A model of electron-stimulated desorption of Li atoms in the Li/Li$_x$Au$_y$/Au/W system is proposed.