The effect of alkali-metal chemisorption on the surface electronic structure of Ta(110) is presented. A d-derived surface state on clean Ta(110) is strongly modified, as manifested by a level shift and lateral delocalization. Strong mixing between alkali-metal and substrate valence bands is observed. It is suggested that alkali-metal overlayers on the more complex metals have fundamentally different behavior than on simple metal substrates.
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Kneedler et al. (1995) studied this question.
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