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    Inhomogeneous contraction of interatomic distances in metallic clusters: Calculations for Csn and OCsn

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    Inhomogeneous contraction ... (539.3Kb)
    Identificadores
    URI: http://hdl.handle.net/10902/1769
    DOI: 10.1103/PhysRevB.44.7273
    ISSN: 1095-3795
    ISSN: 0163-1829
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    Author
    Mañanes Pérez, ÁngelAutoridad Unican; Alonso, Julio Alfonso; Lammers, U.; Borstel, Gunnar
    Date
    1991-10-01
    Derechos
    © 1991 The American Physical Society
    Publicado en
    Physical Review. B, Condensed Matter, vol. 44, Num. 14, pag. 7273-7282, 1991
    Publisher
    American Physical Society
    Enlace a la publicación
    http://dx.doi.org/10.1103/PhysRevB.44.7273
    Abstract:
    The equilibrium geometrical structures of Csn and OCsn clusters have been obtained by a method that, in the framework of density-functional theory, describes the ion-electron interaction by means of a pseudopotential that is spherically averaged about the cluster center. In the size range studied (up to n =78 and 70, respectively) the clusters present well-separated atomic layers for which the distances to the two closest neighbors of each atom have been analyzed, showing that there is an inhomogeneous shrinking of the geometrical structure, in the sense that the distances obtained for atoms in the inner layers are lower than those for the outer ones. The analysis of the growing of the clusters suggests that the equilibrium geometries are those for which any atom of the aggregate has its closest neighbor at a distance lower than the nearest-neighbor distance of the pure bulk metal. For small (n ≤ 20) pure clusters, geometries of high symmetry have been found, which are completely modified by the presence of the oxygen impurity. A regular octahedron is formed around the oxygen atom in most cases.
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    UNIVERSIDAD DE CANTABRIA

    Repositorio realizado por la Biblioteca Universitaria utilizando DSpace software
    Contact Us | Send Feedback
    Metadatos sujetos a:licencia de Creative Commons Reconocimiento 3.0 España