Does the Dirac Cone Exist in Silicene on Metal Substrates?

Absence of the Dirac cone due to a strong band hybridization is revealed to be a common feature for epitaxial silicene on metal substrates according to our first-principles calculations for silicene on Ir, Cu, Mg, Au, Pt, Al and Ag substrates. The destroyed Dirac cone of silicene, however, can be ef...

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Bibliographic Details
Published in:Scientific reports 2014-06, Vol.4 (1), p.5476-5476, Article 5476
Main Authors: Quhe, Ruge, Yuan, Yakun, Zheng, Jiaxin, Wang, Yangyang, Ni, Zeyuan, Shi, Junjie, Yu, Dapeng, Yang, Jinbo, Lu, Jing
Format: Article
Language:English
Subjects:
639/301/1034/1038
639/301/119/995
Alkali metals
Copper
Crystallization
Humanities and Social Sciences
Hybridization
multidisciplinary
Science
Substrates
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Summary:Absence of the Dirac cone due to a strong band hybridization is revealed to be a common feature for epitaxial silicene on metal substrates according to our first-principles calculations for silicene on Ir, Cu, Mg, Au, Pt, Al and Ag substrates. The destroyed Dirac cone of silicene, however, can be effectively restored with linear or parabolic dispersion by intercalating alkali metal atoms between silicene and the metal substrates, offering an opportunity to study the intriguing properties of silicene without further transfer of silicene from the metal substrates.
ISSN:2045-2322
2045-2322
DOI:10.1038/srep05476