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New Findings on Multilayer Silicene on Si(111)√3×√3R30°–Ag Template

1
Consiglio Nazionale delle Ricerche-ISM, Via Fosso del Cavaliere 100, 00133 Roma, Italy
2
INFN-Laboratori Nazionali di Frascati Via Enrico Fermi 40, Frascati, 00044 Roma, Italy
3
Consiglio Nazionale delle Ricerche-ISAC, Via Fosso del Cavaliere 100, 00133 Roma, Italy
4
Institute of Physics, Maria Curie-Sklodowska University, pl. M. Curie-Sklodowskiej 1, 20-031 Lublin, Poland
*
Authors to whom correspondence should be addressed.
Materials 2019, 12(14), 2258; https://doi.org/10.3390/ma12142258
Received: 15 June 2019 / Revised: 8 July 2019 / Accepted: 11 July 2019 / Published: 13 July 2019
(This article belongs to the Special Issue 2D Materials for Advanced Devices)
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Abstract

We report new findings on multilayer silicene grown on Si(111)√3 × √3 R30°–Ag template, after the recent first compelling experimental evidence of its synthesis. Low-energy electron diffraction, reflection high-energy electron diffraction, and energy-dispersive grazing incidence X-ray diffraction measurements were performed to show up the fingerprints of √3 × √3 multilayer silicene. Angle-resolved photoemission spectroscopy displayed new features in the second surface Brillouin zone, attributed to the multilayer silicene on Si(111)√3 × √3 R30°–Ag. Band-structure dispersion theoretical calculations performed on a model of three honeycomb stacked layers, silicene grown on Si(111)√3 × √3 R30°-Ag surface confirm the experimental results. View Full-Text
Keywords: multilayer silicene; LEED/RHEED; ED-GIXRD; GWAXS/GSAXS; ARPES; DFT multilayer silicene; LEED/RHEED; ED-GIXRD; GWAXS/GSAXS; ARPES; DFT
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De Padova, P.; Generosi, A.; Paci, B.; Ottaviani, C.; Quaresima, C.; Olivieri, B.; Kopciuszyński, M.; Żurawek, L.; Zdyb, R.; Krawiec, M. New Findings on Multilayer Silicene on Si(111)√3×√3R30°–Ag Template. Materials 2019, 12, 2258.

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