Electron reflectivity measurements of Ag adatom concentrations on W(110)

Details Electron reflectivity measurements of Ag adatom concentrations on W(110) Electron reflectivity measurements of Ag adatom concentrations on W(110)

2006-01-18

arxiv.org/abs/cond-mat/0601406v1

Surf. Sci. 600 (2006) 4062-4066

Physics

Condensed Matter

Materials Science

Presented at the ECOSS 23 Conference (Berlin 2005)

Scientific paper

10.1016/j.susc.2006.02.069

The density of two-dimensional Ag adatom gases on W(110) is determined by monitoring local electron reflectivity using low energy electron microscopy (LEEM). This method of adatom concentration measurement can detect changes in adatom density at least as small as 10$^{-3}$ ML for a $\mu$m size region of the surface. Using this technique at high temperatures, we measure the sublimation rates of Ag adatoms on W(110). At lower temperatures, where Ag adatoms condense into monolayer islands, we determine the temperature dependence of the density of adatoms coexisting with this condensed phase and compare it with previous estimates.

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