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Materials (Basel). 2019 Jul 13;12(14). pii: E2258. doi: 10.3390/ma12142258.

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

Author information

1
Consiglio Nazionale delle Ricerche-ISM, Via Fosso del Cavaliere 100, 00133 Roma, Italy. paola.depadova@ism.cnr.it.
2
INFN-Laboratori Nazionali di Frascati Via Enrico Fermi 40, Frascati, 00044 Roma, Italy. paola.depadova@ism.cnr.it.
3
Consiglio Nazionale delle Ricerche-ISM, Via Fosso del Cavaliere 100, 00133 Roma, Italy.
4
Consiglio Nazionale delle Ricerche-ISAC, Via Fosso del Cavaliere 100, 00133 Roma, Italy.
5
Institute of Physics, Maria Curie-Sklodowska University, pl. M. Curie-Sklodowskiej 1, 20-031 Lublin, Poland.
6
Institute of Physics, Maria Curie-Sklodowska University, pl. M. Curie-Sklodowskiej 1, 20-031 Lublin, Poland. mariusz.krawiec@umcs.pl.

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.

KEYWORDS:

ARPES; DFT; ED-GIXRD; GWAXS/GSAXS; LEED/RHEED; multilayer silicene

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