Evidence for hybrid surface metallic band in (4x4) silicene on Ag(111)

被引：104
|
作者：
Tsoutsou, D. [1 ]
Xenogiannopoulou, E. [1 ]
Golias, E. [1 ]
Tsipas, P. [1 ]
Dimoulas, A. [1 ]
机构：
[1] Natl Ctr Sci Res Demokritos, Athens 15310, Greece
来源：
APPLIED PHYSICS LETTERS | 2013年 / 103卷 / 23期
关键词：
D O I：
10.1063/1.4841335
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
The electronic band structure of monolayer (4 x 4) silicene on Ag(111) is imaged by angle resolved photoelectron spectroscopy. A dominant hybrid surface metallic band is observed to be located near the bulk Ag sp-band which is also faintly visible. The two-dimensional character of the hybrid band has been distinguished against the bulk character of the Ag(111) sp-band by means of photon energy dependence experiments. The surface band exhibits a steep linear dispersion around the (K) over bar Ag point and has a saddle point near the (M) over bar Ag point of Ag(111) resembling the pi-band dispersion in graphene. (C) 2013 AIP Publishing LLC.
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页数：5
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