Journal
SCIENTIFIC REPORTS
Volume 5, Issue -, Pages -Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/srep13590
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Funding
- MOST of China [2013CBA01600, 2012CB921703, 2013CB921702]
- NSF of China [11334011, 11322431, 11174344, 91121003]
- Strategic Priority Research Program of the Chinese Academy of Sciences [XDB07020100]
- Australian Research Council (ARC) [DP 140102581]
- University of Wollongong
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The multilayer silicene films were grown on Ag(111), with increasing thickness above 30 monolayers (ML). Scanning tunneling microscopy (STM) observations suggest that the multilayer silicene is indeed a bulk-like Si(111) film with a (root 3 x root 3)R30 degrees honeycomb superstructure on surface. The possibility for formation of Si(111)(root 3 x root 3) R30 degrees-Ag reconstruction on the surface can be distinctively ruled out by peeling off the surface layer with the STM tip. On this surface, delocalized surface state as well as linear energy-momentum dispersion was observed from quasiparticle interference patterns. Our results indicate that a bulklike silicon film with diamondlike structure can also host delocalized surface state, which is even more attractive for potential applications, such as new generation of nanodevices based on Si.
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