Large differences in the optical properties of a single layer of Si on Ag(110) compared to silicene

Abstract : The optical properties of Si nanoribbons grown on Ag(110) under ultrahigh vacuum have been experimentally determined by use of in situ surface differential reflectance spectroscopy. Real-time measurements showed a clear transition of the optical response of the Si deposit at full coverage of the Ag(110) surface, corresponding to 0.8 monolayer of silicon. The spectra measured for the complete self-assembled nanoribbon layer are different from the reflectance spectrum calculated for a layer of silicene on silver, which rules out the possible silicenelike character of this layer. Furthermore, the dielectric function of the nanoribbons is calculated from the experimental data and is similar to the one of amorphous silicon, with a red shift of about 0.6 to 0.8 eV of the main absorption feature. This result indicates that the Si nanoribbons display a preferential sp 3 hybridization as in amorphous Si and not a partial sp 2 hybridization as expected for silicene.
Document type :
Journal articles
Complete list of metadatas

Cited literature [31 references]  Display  Hide  Download

https://hal.archives-ouvertes.fr/hal-01021106
Contributor : Hal Cinam <>
Submitted on : Sunday, April 29, 2018 - 9:05:20 AM
Last modification on : Tuesday, May 14, 2019 - 10:42:11 AM

File

2014_Borensztein_et_al_PRB_89_...
Publisher files allowed on an open archive

Identifiers

Citation

Y. Borensztein, Geoffroy Prévot, L. Masson. Large differences in the optical properties of a single layer of Si on Ag(110) compared to silicene. Physical Review B : Condensed matter and materials physics, American Physical Society, 2014, 89 (54), pp.245410. ⟨10.1103/PhysRevB.89.245410⟩. ⟨hal-01021106⟩

Share

Metrics

Record views

145

Files downloads

111