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- Title
Delocalized Surface State in Epitaxial Si(111) Film with Spontaneous √3 × √3 Superstructure.
- Authors
Chen, Jian; Du, Yi; Li, Zhi; Li, Wenbin; Feng, Baojie; Qiu, Jinlan; Cheng, Peng; Xue Dou, Shi; Chen, Lan; Wu, Kehui
- Abstract
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 (√3 × √3)R30° honeycomb superstructure on surface. The possibility for formation of Si(111)(√3 × √3)R30°-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.
- Subjects
SURFACE states; SILICON epitaxy; MICROELECTRONICS; QUASIPARTICLES; QUANTUM theory
- Publication
Scientific Reports, 2015, p13590
- ISSN
2045-2322
- Publication type
Article
- DOI
10.1038/srep13590