Abstract
The spectral density functions W(f) of the field-emission flicker noise of lithium adsorbed on the tungsten (112) plane were determined at different temperatures in a probe-hole field emission microscope. By an analysis in terms of the Timm and van der Ziel model the surface diffusion coefficients have been obtained and their temperature dependence reveals the surface diffusion energies. For the two coverages of c = 0.38 and 0.75 investigated their values could be determined to be Q = 0.56 and 1.08 eV, respectively. The diffusivity prefactors were also calculated. The results are compared with those obtained for the W(112)K system.
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