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  • 36.40.+d  (1)
  • PACS. 36.40.Qv Stability and fragmentation of clusters – 36.40.Wa Charged clusters  (1)
  • PACS: 36.40.-c Atomic and molecular clusters – 32.10.Dk Electric and magnetic moments, polarizability – 31.15.Ew Density functional theory  (1)
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  • 1
    Digitale Medien
    Digitale Medien
    Static electric dipole polarizabilities of alkali clusters (1999)
    Springer
    The European physical journal 9 (1999), S. 243-248 
    Details
    ISSN: 1434-6079
    Schlagwort(e): PACS: 36.40.-c Atomic and molecular clusters – 32.10.Dk Electric and magnetic moments, polarizability – 31.15.Ew Density functional theory
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract. We have measured the static dipole polarizability of lithium and sodium clusters (n=1-22). Values measured for sodium are in agreement with previous experiments. While the polarizability per atom for sodium clusters decreases slowly as a function of the cluster size, a sharp decrease between sizes 1 and 4 is observed for lithium clusters. Experimental values are compared to Density Functional Theory (DFT/PW91) calculations. The size evolutions for sodium and lithium cluster polarizabilities are well reproduced by our calculations. The sharp decrease observed for small lithium clusters is discussed in terms of electronic density.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/s100530050433
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  • 2
    Digitale Medien
    Digitale Medien
    Stability of charged metal clusters in the vicinity of an ionic charge (2003)
    Springer
    The European physical journal 23 (2003), S. 359-368 
    Details
    ISSN: 1434-6079
    Schlagwort(e): PACS. 36.40.Qv Stability and fragmentation of clusters – 36.40.Wa Charged clusters
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract: Stability of highly charged metal clusters in the electric field of an external ion is investigated with the classical liquid drop model. We study the optimum shape of the cluster which has a local minimum of the total energy, taking account of the effects of the surface charge polarization on the Coulomb energy and the cluster deformation on the surface energy. We find that the cluster deformation greatly affects the total energy of the system and that a cluster with a fissility larger than some critical value 0.7-0.8 can become unstable against deformation. We investigate the local competition between the Coulomb force and the surface tension at the cluster surface and show that the surface charge polarization which is induced by the external electric field significantly affects the shape of the cluster and its stability.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1140/epjd/e2003-00062-4
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  • 3
    Digitale Medien
    Digitale Medien
    Ionic structure effects on the optical response of lithium clusters (1993)
    Springer
    The European physical journal 28 (1993), S. 81-85 
    Details
    ISSN: 1434-6079
    Schlagwort(e): 71.10.+x ; 36.40.+d ; 31.10.+z
    Quelle: Springer Online Journal Archives 1860-2000
    Thema: Physik
    Notizen: Abstract The optical response of alkali metal clusters is shown to be sensitive to a proper treatment of the electronion interaction and to the ionic spatial structure. A spherical symmetry model based on a combination of a geometrical optimization of the ionic structure and the random phase approximation (RPA) with exact exchange is applied to calculate the optical response of Li 139 + . The optical response obtained within this model is in good agreement with the measured giant dipole resonance.
    Materialart: Digitale Medien
    URL: http://dx.doi.org/10.1007/BF01437458
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