Core-polarization-corrected random-phase approximation with exact exchange for dipole surface plasmons in silver clusters

Fengyuan Xuan and Claude Guet
Phys. Rev. A 94, 043415 – Published 20 October 2016

Abstract

The surface plasmon in silver clusters is red shifted with respect to standard jellium random-phase approximation (RPA) predictions that work well for simple metal clusters. The reason for the deviation arises primarily from the non-negligible polarization interaction between the valence electrons and ionic cores. In order to quantify this effect in the jellium approximation we introduce a modified RPAE (RPA with exact exchange). The jellium background of Ag cores is treated as a polarizable sphere. This model predicts a dipole surface resonance in excellent agreement with published experimental data. Moreover it yields the blue shift (red shift) with decreasing sizes for cationic (anionic) Ag clusters as observed experimentally.

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  • Received 19 August 2016

DOI:https://doi.org/10.1103/PhysRevA.94.043415

©2016 American Physical Society

Physics Subject Headings (PhySH)

Atomic, Molecular & Optical

Authors & Affiliations

Fengyuan Xuan* and Claude Guet

  • Energy Research Institute at Nanyang Technological University (ERI@N), 1 Clean Tech Loop, Clean Tech One, Singapore 637141

  • *Interdisciplinary Graduate School, Nanyang Technological University, Singapore.
  • Corresponding author: cguet@ntu.edu.sg

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Issue

Vol. 94, Iss. 4 — October 2016

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