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- W2072012362 abstract "Alkali metal atoms deposited on transition metal dichalcogenides (TMDCs) can either diffuse on the surface or intercalate into the van der Waals gaps of the substrate. In order to understand the interplay between adsorption and intercalation of alkali atoms at these layered crystals, we performed a detailed study of the migration and energetics of Li adatom on TiSe2(0 0 0 1) surface, employing total-energy density-functional theory calculations. To get insight into stable and metastable states, diffusion paths and diffusion barriers for the Li adatom, we calculated the adatom's potential energy surface, to find e.g. the hcp site energetically slightly preferred over the fcc site. Results are also given for other alkali atoms. To obtain information about the adsorbate–substrate bond, the change in the valence electron density and orbital distribution was studied. The paths of direct intercalation for the alkali atom from the surface through the three layered TiSe2 sandwich into the van der Waals gap were investigated. It was found that the alkali atom has to overcome an energy barrier of at least 3.81 eV to make the direct intercalation possible." @default.
- W2072012362 created "2016-06-24" @default.
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- W2072012362 date "2001-06-01" @default.
- W2072012362 modified "2023-10-12" @default.
- W2072012362 title "Diffusion and intercalation of alkali atoms in transition metal dichalcogenides" @default.
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- W2072012362 doi "https://doi.org/10.1016/s0039-6028(01)00863-9" @default.
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