Showing papers by "José M. Soler published in 1987"
TL;DR: In this paper, the authors show that if the metal-overlayer distance is assumed to increase with coverage, the experimental behavior of the work function is much better reproduced, in particular the minimum work function shifts to higher coverages, in agreement with experimental results.
Abstract: The work function of metals is lowered upon alkali-metal adsorption and this lowering (\ensuremath{\Delta}\ensuremath{\Phi}) is known to be coverage dependent. Using standard jellium-model calculations, we show that if the metal-overlayer distance is assumed to increase with coverage, the experimental behavior of \ensuremath{\Delta}\ensuremath{\Phi} is much better reproduced. In particular the minimum work function is increased and shifted to higher coverages, in agreement with experimental results. The increase of distance with coverage also leads to an energetically more stable configuration.
21 citations
TL;DR: In this paper, the authors show that the oscillatory behavior of tunnel spectra measured with the scanning tunneling microscope (STM) reflects the existence of localized surface states at the crystal-vacuum interface.
10 citations