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Shell-correction and orbital-free density-functional methods for finite systems

Author: Constantine Yannouleas, Uzi Landman
Url: http://arxiv.org/abs/1004.3536
Format: Ps,Pdf
Year: 2010
Category: Density Functional Theory
Pages: 47
Clicks: 1578

Orbital-free (OF) methods promise significant speed-up of computations based on density functional theory (DFT). In this field, the development of accurate kinetic-energy density functionals remains an open question. In this chapter we review the shell-correction method (SCM, commonly known as Strutinsky\'s averaging method) applied originally in nuclear physics and its more recent formulation in the context of DFT [Yannouleas and Landman, Phys. Rev. B 48, 8376 (1993)]. We demonstrate the DFT-SCM method through its earlier applications to condensed-matter finite systems, including metal clusters, fullerenes, and metal nanowires. The DFT-SCM incorporates quantum mechanical interference effects and thus offers an improvement compared to the use of Thomas-Fermi-type kinetic energy density functionals in OF-DFT.

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