Double-pentagon silicon chains in a quasi-1D Si/Ag(001) surface alloy

Silicon surface alloys and silicide nanolayers are highly important as contact materials in integrated circuit devices. Here we demonstrate that the submonolayer Si/Ag(001) surface reconstruction, reported to exhibit interesting topological properties, comprises a quasi-one-dimensional Si-Ag surface alloy based on chains of planar double-pentagon Si moieties. This geometry is determined using a combination of density functional theory calculations, scanning tunnelling microscopy, and grazing incidence x-ray diffraction simulations, and yields an electronic structure in excellent agreement with photoemission measurements. This work provides further evidence of pentagonal geometries in 2D materials and heterostructures and elucidates the importance of surface alloying in stabilizing their formation.

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Publication Details

Journal
Nature Communications
Published
2024-10-25
DOI
https://doi.org/10.1038/s41467-024-53589-4
Primary Topic
Surface and Thin Film Phenomena
Type
article
Field-Weighted Citation Impact
0.00

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article

Double-pentagon silicon chains in a quasi-1D Si/Ag(001) surface alloy

Angelica Sette, L. Masson, F. Ronci, Romain Bernard et al.
Nature Communications
Surface and Thin Film Phenomena
article

Double-pentagon silicon chains in a quasi-1D Si/Ag(001) surface alloy

Angelica Sette, L. Masson, F. Ronci, Romain Bernard, Vasil A. Saroka, Geoffroy Prévot, Stefano Colonna, Conor Hogan, R. Flammini, Laurita Florean
article en

Abstract

Silicon surface alloys and silicide nanolayers are highly important as contact materials in integrated circuit devices. Here we demonstrate that the submonolayer Si/Ag(001) surface reconstruction, reported to exhibit interesting topological properties, comprises a quasi-one-dimensional Si-Ag surface alloy based on chains of planar double-pentagon Si moieties. This geometry is determined using a combination of density functional theory calculations, scanning tunnelling microscopy, and grazing incidence x-ray diffraction simulations, and yields an electronic structure in excellent agreement with photoemission measurements. This work provides further evidence of pentagonal geometries in 2D materials and heterostructures and elucidates the importance of surface alloying in stabilizing their formation.

Nature CommunicationsVol. 15(1)
University of Rome Tor Vergata (IT), Centre National de la Recherche Scientifique (FR), Aix-Marseille Université (FR), Sorbonne Université (FR), Institute of Structure of Matter (IT), Institut des NanoSciences de Paris (FR), Laboratoire de Chimie Physique - Matière et Rayonnement (FR), Centre Interdisciplinaire de Nanoscience de Marseille (FR)
HORIZON EUROPE Marie Sklodowska-Curie Actions
Openalex Percentile: Top 83%
Surface and Thin Film Phenomena
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