Open AccessЭлектронно-стимулированная десорбция атомов цезия с графена на иридии, интеркалированного и не интеркалированого цезием
Author(s) -
Ю.А. Кузнецов,
М.Н. Лапушкин,
Е.В. Рутьков,
Norman Gall
Publication year - 2019
Publication title -
fizika tverdogo tela
Language(s) - English
Resource type - Journals
eISSN - 1726-7498
pISSN - 0367-3294
DOI - 10.21883/ftt.2019.08.47983.425
Subject(s) - graphene , atomic physics , intercalation (chemistry) , excitation , desorption , atom (system on chip) , electron , dielectric , energy (signal processing) , materials science , core (optical fiber) , analytical chemistry (journal) , chemistry , physics , adsorption , nanotechnology , optoelectronics , inorganic chemistry , nuclear physics , quantum mechanics , chromatography , computer science , embedded system , composite material
Electron stimulated desorption (ESD) of neutral atomic Cs from graphene on Ir has been studied for two cases: when Cs intercalation does present and when it does not take place. Two peaks have been found at desorbed atom energy distribution: high-energy (HE) at the energy of 0.36 eV and low-energy (LE) one at the energy of 0.13 eV. HE peak has been observed for both cases, we attribute it with excitation of 2s carbon core level. LE peak was observed only when intercalation does not take place; we attribute it with excitation of 4f and 5p core levels of Ir. A model is put forward to describe atomic Cs ESD; we proposed that graphene on Ir acts as dielectric in the processes discussed above.