KIP publications

year 2019
author(s) Zamin Mamiyev, Michael Tzschoppe, Christian Huck, Annemarie Pucci, and Herbert Pfnür
title Plasmon Standing Waves by Oxidation of Si(553)–Au
KIP-Nummer HD-KIP 19-21
KIP-Gruppe(n) F6
document type Paper
source J. Phys. Chem. C (2019) 123, 14, 9400-9406
doi 10.1021/acs.jpcc.9b01372
Abstract (en)

Self-assembled Au atomic wires on stepped Si surfaces are metallic, as evidenced by one-dimensionally dispersing plasmonic excitation. Here, we investigate the effects of oxidation on metallicity along such Au atomic wires on a regularly stepped Si(553) surface by employing infrared absorption and high-resolution electron energy loss spectroscopies. Our results indicate that only the Si environment undergoes oxidation, which has a remarkably small effect on the plasmon dispersion. However, close to k∥ → 0 the plasmon dispersion starts at increasingly higher energies as a function of oxygen exposure, which is attributed to standing wave formation on small sections of Au wires generated by the introduction of O atoms as scattering centers, not to electronic gap opening. This interpretation is in full agreement with the findings by infrared spectroscopy and low-energy electron diffraction.

  author   = {Mamiyev, Zamin and Tzschoppe, Michael and Huck, Christian and Pucci, Annemarie and Pfn\"ur, Herbert},
  title    = {Plasmon Standing Waves by Oxidation of Si(553)–Au},
  journal  = {The Journal of Physical Chemistry C},
  year     = {2019},
  volume   = {123},
  number   = {14},
  pages    = {9400-9406},
  doi      = {10.1021/acs.jpcc.9b01372},
  url      = {}
URL Mamiyev19a
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