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    • Van der Waals coefficients for alkali metal clusters and their size dependence

      Arup Banerjee Manoj K Harbola

      Volume 66 Issue 2 February 2006 pp 423-433

    • Fulltext

       

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      Permanent link:
      https://www.ias.ac.in/article/fulltext/pram/066/02/0423-0433

    • Keywords

       

      Metal clusters; response properties; van der Waals coefficients

    • Abstract

       

      In this paper we employ the hydrodynamic formulation of time-dependent density functional theory to obtain the van der Waals coefficientsC6 andC8 of alkali metal clusters of various sizes including very large clusters. Such calculations become computationally very demanding in the orbital-based Kohn-Sham formalism, but are quite simple in the hydrodynamic approach. We show that for interactions between the clusters of the same sizes,C6 andC8 scale as the sixth and the eighth power of the cluster radius, respectively, and approach their classically predicted values for the large size clusters.

    • Author Affiliations

       

      Arup Banerjee1 Manoj K Harbola2

      1. Laser Physics Division, Centre for Advanced Technology, Indore - 452 013, India
      2. Department of Physics, Indian Institute of Technology, Kanpur - 208 016, India

    • Dates

       
      Published
      February 2006
      Manuscript received
      19 July 2005
      Accepted
      15 September 2005

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