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arXiv 0810.2413cond-mat.mtrl-sci
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Ag(111)表面铯超晶格的扫描隧道显微镜和动力学蒙特卡罗研究

Scanning tunneling microscopy and kinetic Monte Carlo investigation of Cesium superlattices on Ag(111)

M. Ziegler, J. Kroeger, R. Berndt, A. Filinov, M. Bonitz

摘要:

用低温扫描隧道显微镜对铯在Ag(111)表面的吸附结构进行了表征。在低覆盖率下,个别Cs原子的原子分辨率偶尔会在梯田上的六边形有序吸附物膜的区域中受到抑制。靠近台阶边缘的Cs原子沿台阶边缘方向呈现为细长的突起。在较高的覆盖率,原子分辨六方晶格的Cs超结构观察。动力学蒙特卡罗模拟模型观察到的吸附质结构的定性水平。

英文摘要:

Cesium adsorption structures on Ag(111) were characterized in a low-temperature scanning tunneling microscopy experiment. At low coverages, atomic resolution of individual Cs atoms is occasionally suppressed in regions of an otherwise hexagonally ordered adsorbate film on terraces. Close to step edges Cs atoms appear as elongated protrusions along the step edge direction. At higher coverages, Cs superstructures with atomically resolved hexagonal lattices are observed. Kinetic Monte Carlo simulations model the observed adsorbate structures on a qualitative level.

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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