Naslov
Energy loss in gas-surface dynamics: Electron–hole pair and phonon excitation upon adsorbate relaxation

Autori
Novko, D. ; Blanco-Rey, M. ; Juaristi, J.I. ; Alducin, M.

Izvornik
Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms (0168-583X) 382 (2016); 26-31

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
ab initio molecular dynamics, electronic friction

Sažetak
We study the effect of electron and phonon degrees of freedom on the relaxation dynamics of adsorption processes in gas-surface systems by using ab initio molecular dynamics that incorporates an electronic friction force (AIMDEF). As representative cases we have chosen three systems with different adsorption energies and adsorbate-to-surface atom mass ratios: H on Pd(100), N on Ag(111), and on Fe(110). We show, through inspection of the total energies and trajectories of the hot adsorbates on the surface, that electron–hole (e–h) pair excitations dominate relaxation of the light gas species, while the phonon channel is dominant for the heavy species. In the latter case e–h pairs become more important at the final thermalization stages.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA