Conserving quasiparticle calculations for small metal clusters

2009/02/26 by George Pal, Y. Pavlyukh, Yaroslav Pavlyukh +3
Chemistry · Earth and Planetary Sciences · Physics and Astronomy · #Advanced Chemical Physics Studies #Chemistry #Energy (signal processing) #Function (biology) #Metal #Physics #Quantum mechanics #Quasiparticle #Rare-earth and actinide compounds #Superconductivity #cond-mat.str-el #nanoparticles nucleation surface interactions

paper · pdf · doi:10.1140/epjb/e2009-00253-9

arxiv created 2009/02/26 · openalex publication_date 2009/07/21 · arxiv updated 2015/05/12 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

A novel approach for GW-based calculations of quasiparticle properties for finite systems is presented, in which the screened interaction is obtained directly from a linear response calculation of the density-density correlation function. The conserving nature of our results is shown by explicit evaluation of the f-sum rule. As an application, energy renormalizations and level broadenings are calculated for the closed-shell Na₉⁺ and Na₂₁⁺ clusters, as well as for Na₄. Pronounced improvements of conserving approximations to RPA-level results are obtained.

Citations

• New Method for Calculating the One-Particle Green's Function with Application to the Electron-Gas Problem
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