Self-organized long-period adatom strings on stepped metal surfaces:: Scanning tunneling microscopy, ab initio calculations, and kinetic Monte Carlo simulations
Self-organized long-period adatom strings on stepped metal surfaces:: Scanning tunneling microscopy, ab initio calculations, and kinetic Monte Carlo simulations
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阶梯金属表面上的自组织长周期吸附原子串：扫描隧道显微镜、从头计算和动力学蒙特卡罗模拟
DOI：
10.1103/physrevb.76.033409
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发表时间：
2007-07-01
影响因子：
3.7
通讯作者：
Kirschner, J.
中科院分区：
文献类型：
--
作者：
Ding, H. F.;Stepanyuk, V. S.;Kirschner, J.
结合实验和从头算研究表明，表面态介导的吸附原子-台阶和吸附原子-吸附原子相互作用是低温下Fe吸附原子在Cu（111）邻面自组织的驱动力.我们的扫描隧道显微镜观察和动力学蒙特卡罗模拟揭示了Fe吸附原子的自组织成原子弦。串中的原子间距$（1.2\phantom{\rule{0.3em}{0 ex}}\mathrm{nm}）$不是由铜原子沿着台阶边缘的最近邻距离$（0.26\phantom{\rule{0.3em}{0 ex}}\mathrm{nm}）$决定的，而是由表面态电荷密度振荡的波长决定的。
Combined experimental and ab initio studies show that the surface-state-mediated adatom-step and adatom-adatom interactions are the driving forces for the self-organization of Fe adatoms on vicinal Cu(111) surfaces at low temperatures. Our scanning tunneling microscope observations and the kinetic Monte Carlo simulations reveal the self-organization of Fe adatoms into atomic strings. The interatomic separation $(1.2\phantom{\rule{0.3em}{0ex}}\mathrm{nm})$ in the strings is not determined by the nearest-neighbor distance $(0.26\phantom{\rule{0.3em}{0ex}}\mathrm{nm})$ of the Cu atoms along the step edge but by the wavelength of the surface-state charge density oscillations.