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arXiv 1306.5523cond-mat.mtrl-sci
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Ag(111)表面硅烯片的AFM和STM联合测量

Combined AFM and STM measurements of a silicene sheet grown on Ag(111) surface

Zsolt Majzik, Mohamed Rachid Tchalala, Martin Švec, Prokop Hapala, Hanna Enriquez, Abdelkader Kara, Andrew J. Mayne, Gérald Dujardin, Pavel Jelínek, Hamid Oughaddou

摘要:

在这封信中,我们提出了第一个非接触原子力显微镜(nc-AFM)的硅烯在银(Ag)表面,通过结合非接触原子力显微镜(nc-AFM)和扫描隧道显微镜(STM)。在Ag(111)表面上生长的大面积硅烯的STM图像显示了(sqrt 13 xsqrt 13)R13.9°和(4x 4)超结构。对于广泛观察到的(4x 4)结构,nc-AFM形貌显示出原子尺度的对比度反转的针尖-表面距离减少。在最短的针尖-表面距离,nc-AFM的形貌是非常相似的STM之一。在nc-AFM形貌中观察到的结构与仅两个硅原子中的一个可见相容。这明确地表明硅烯蜂窝层的强屈曲。

英文摘要:

In this Letter, we present the first non-contact atomic force microscopy (nc-AFM) of a silicene on silver (Ag) surface, obtained by combining non-contact atomic force microscopy (nc-AFM) and scanning tunneling microscopy (STM). STM images over large areas of silicene grown on Ag(111) surface show both (sqrt13xsqrt13)R13.9° and (4x4) superstructures. For the widely observed (4x4) structure, the nc-AFM topography shows an atomic-scale contrast inversion as the tip-surface distance is decreased. At the shortest tip-surface distance, the nc-AFM topography is very similar to the STM one. The observed structure in the nc-AFM topography is compatible with only one out of two silicon atoms being visible. This indicates unambiguously a strong buckling of the silicene honeycomb layer.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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