Abstract
AbstractThe qualitative theory of Shockley surface states is used to discuss the existence of surface states on three faces of niobium carbide: (001), (011), and (111). The results obtained for NbC are generalized to include other simple transition metal compounds MX, X = C, N, O. Surface states of these and related materials are of interest in chemisorption and catalysis. The qualitative theory of Shockley states appears to be useful tool in detecting strong covalency effects in solids.
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