Using surface and interface optics to probe the capping, with amorphous Si, of Au atom chains grown on vicinal Si(111)

N McAlinden, J F McGilp

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7 Citations (Scopus)

Abstract

The distinct optical signatures of aligned single and double Au atom chain structures, grown on vicinal Si(111) substrates, have been identified using reflectance anisotropy spectroscopy (RAS). Deposition of 0.04 monolayers (ML) of amorphous Si (a-Si) at room temperature perturbs the anisotropic optical response of the double chain structure. By one third of a monolayer, no significant optical anisotropy associated with the chains remains. No anisotropic response re-emerges at higher coverages, up to 4.6 nm (14.5 ML) where there is recent evidence that the crystal structure of the double chain phase is maintained under the cap. The RAS results show that the anisotropic properties of the phase are quenched by a-Si adsorption, even though the crystal structure of the capped phase appears to be preserved.
LanguageEnglish
Article number474208
JournalJournal of Physics: Condensed Matter
Volume21
Issue number47
DOIs
Publication statusPublished - 2009

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Monolayers
Optics
optics
Atoms
probes
Anisotropy
Crystal structure
Spectroscopy
anisotropy
atoms
Optical anisotropy
reflectance
crystal structure
caps
spectroscopy
Adsorption
signatures
Substrates
adsorption
room temperature

Keywords

  • interface optics
  • atom chains
  • atom chain structures

Cite this

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title = "Using surface and interface optics to probe the capping, with amorphous Si, of Au atom chains grown on vicinal Si(111)",
abstract = "The distinct optical signatures of aligned single and double Au atom chain structures, grown on vicinal Si(111) substrates, have been identified using reflectance anisotropy spectroscopy (RAS). Deposition of 0.04 monolayers (ML) of amorphous Si (a-Si) at room temperature perturbs the anisotropic optical response of the double chain structure. By one third of a monolayer, no significant optical anisotropy associated with the chains remains. No anisotropic response re-emerges at higher coverages, up to 4.6 nm (14.5 ML) where there is recent evidence that the crystal structure of the double chain phase is maintained under the cap. The RAS results show that the anisotropic properties of the phase are quenched by a-Si adsorption, even though the crystal structure of the capped phase appears to be preserved.",
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T1 - Using surface and interface optics to probe the capping, with amorphous Si, of Au atom chains grown on vicinal Si(111)

AU - McAlinden, N

AU - McGilp, J F

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Y1 - 2009

N2 - The distinct optical signatures of aligned single and double Au atom chain structures, grown on vicinal Si(111) substrates, have been identified using reflectance anisotropy spectroscopy (RAS). Deposition of 0.04 monolayers (ML) of amorphous Si (a-Si) at room temperature perturbs the anisotropic optical response of the double chain structure. By one third of a monolayer, no significant optical anisotropy associated with the chains remains. No anisotropic response re-emerges at higher coverages, up to 4.6 nm (14.5 ML) where there is recent evidence that the crystal structure of the double chain phase is maintained under the cap. The RAS results show that the anisotropic properties of the phase are quenched by a-Si adsorption, even though the crystal structure of the capped phase appears to be preserved.

AB - The distinct optical signatures of aligned single and double Au atom chain structures, grown on vicinal Si(111) substrates, have been identified using reflectance anisotropy spectroscopy (RAS). Deposition of 0.04 monolayers (ML) of amorphous Si (a-Si) at room temperature perturbs the anisotropic optical response of the double chain structure. By one third of a monolayer, no significant optical anisotropy associated with the chains remains. No anisotropic response re-emerges at higher coverages, up to 4.6 nm (14.5 ML) where there is recent evidence that the crystal structure of the double chain phase is maintained under the cap. The RAS results show that the anisotropic properties of the phase are quenched by a-Si adsorption, even though the crystal structure of the capped phase appears to be preserved.

KW - interface optics

KW - atom chains

KW - atom chain structures

U2 - 10.1088/0953-8984/21/47/474208

DO - 10.1088/0953-8984/21/47/474208

M3 - Article

VL - 21

JO - Journal of Physics: Condensed Matter

T2 - Journal of Physics: Condensed Matter

JF - Journal of Physics: Condensed Matter

SN - 0953-8984

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