The tight-binding method for calculating the electronic structure of a slab of regulary stacked atomic planes has been extended to treat the case of a (0001) surface of a hexagonal-close-packed (hcp) transition metal. The symmetry of the Hamiltonian is discussed and the basis functions of the representations along high-symmetry lines of the two-dimensional Brillouin zone are given. The theory is applied to the study of a 13-layer slab of hcp scandium. We find that several surface states and resonances arise in the d-band region and we discuss the effects of the self-consistency on these surface features. Possible experiments to test the theoretical results are suggested.

Linear-Combination-of-Atomic-Orbital description of the electron states at the (0001) surfaces of hexagonal-close-packed metals / Bertoni, Carlo Maria; Bisi, Olmes; Manghi, Franca. - In: PHYSICAL REVIEW. B, CONDENSED MATTER. - ISSN 0163-1829. - STAMPA. - 17(1978), pp. 3750-3756.

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