期刊
JOURNAL OF PHYSICS-CONDENSED MATTER
卷 26, 期 18, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0953-8984/26/18/185002
关键词
silicene; first principles calculations; Cl-passivated Si(111) surface; CaF2(111) surface; Dirac cones
资金
- Carl-Zeiss Foundation
By means of first-principles calculations we predict the stability of silicene layers as buckled honeycomb lattices on Cl-passivated Si(1 1 1) and clean CaF2(1 1 1) surfaces. The van der Waals interaction between silicene and the inert substrate stabilizes the adsorbate system while not destroying the Si p(z)-derived linear bands forming Dirac cones at the Brillouin zone corners. Only small gaps of about 3 and 52 meV are opened.
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