Silicene: Compelling Experimental Evidence for Graphenelike Two-Dimensional Silicon
Silicene: Compelling Experimental Evidence for Graphenelike Two-Dimensional Silicon
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DOI：
10.1103/physrevlett.108.155501
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发表时间：
2012-04-12
影响因子：
8.6
通讯作者：
Le Lay, Guy
中科院分区：
文献类型：
--
作者：
Vogt, Patrick;De Padova, Paola;Le Lay, Guy
由于其独特的物理性质，碳原子的二维蜂窝排列石墨烯引起了人们的极大关注。硅烯，相当于硅的石墨烯，可能会跟随这一趋势，开辟新的应用前景，特别是由于它与硅基电子产品的兼容性。理论上，硅烯被预测为硅原子的蜂窝状弯曲排列，具有类似于相对论狄拉克费米子的电子色散。在这里，我们提供了令人信服的证据，从结构和电子性质，通过结合扫描隧道显微镜和角分辨光电子能谱结合基于密度泛函理论的计算，在银(111)衬底上合成外延硅烯薄膜。
Because of its unique physical properties, graphene, a 2D honeycomb arrangement of carbon atoms, has attracted tremendous attention. Silicene, the graphene equivalent for silicon, could follow this trend, opening new perspectives for applications, especially due to its compatibility with Si-based electronics. Silicene has been theoretically predicted as a buckled honeycomb arrangement of Si atoms and having an electronic dispersion resembling that of relativistic Dirac fermions. Here we provide compelling evidence, from both structural and electronic properties, for the synthesis of epitaxial silicene sheets on a silver (111) substrate, through the combination of scanning tunneling microscopy and angular-resolved photoemission spectroscopy in conjunction with calculations based on density functional theory.