Optical characterization of gold chains and steps on the vicinal Si(557) surface: theory and experiment

Conor Hogan, Niall McAlinden, John F. McGilp

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Abstract

We present a joint experimental-theoretical study of the reflectance anisotropy of clean and gold-covered Si(557), a vicinal surface of Si(111) upon which gold forms quasi-one-dimensional (1D) chains parallel to the steps. By means of first-principles calculations, we analyse the close relationship between the various surface structural motifs and the optical properties. Good agreement is found between experimental and computed spectra of single-step models of both clean and Au-adsorbed surfaces. Spectral fingerprints of monoatomic gold chains and silicon step edges are identified. The role of spinorbit coupling (SOC) on the surface optical properties is examined, and found to have little effect.

Original languageEnglish
Pages (from-to)1095-1104
Number of pages10
JournalPhysica Status Solidi B
Volume249
Issue number6
DOIs
Publication statusPublished - Jun 2012

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Keywords

  • gold chains
  • ab initio theory
  • gold
  • Si(557)-Au

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