Deposition of Au on vicinal Si(553) surfaces results in the self-assembly of one-dimensional (1D) Au atomic wires. Charge transfer from the Au wire to the Si step edge leads to a chain of Si danglingbond orbitals with a long range ordered threefold periodicity along the steps and infinite interchain interaction perpendicular to the steps. Employing spot-profile analysis low-energy electron diraction (SPA-LEED) we observed a broadening of spot width with time, reflecting the degradation of Si dangling bond chain and Au wire length. Adsorbates were identified as primary source for spot broadening. They force the generation of solitons and anti-solitons which immediately destroy the long-range order along and perpendicular to the steps, respectively. From the temporal evolution of broadening, we conclude that the Au wires are less reactive to adsorption than the Si dangling bond chains.

中文翻译：

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一维原子线的吸附诱导操作：Si(553)-Au 系统中长程有序的降解

Au 在相邻的 Si(553) 表面上的沉积导致一维 (1D) Au 原子线的自组装。从 Au 线到 Si 台阶边缘的电荷转移导致 Si 悬空键轨道链，沿着台阶具有长程有序的三重周期性，以及与台阶垂直的无限链间相互作用。采用光斑轮廓分析低能电子定向 (SPA-LEED)，我们观察到光斑宽度随时间变宽，反映了 Si 悬空键链和 Au 线长度的退化。吸附物被确定为斑点扩大的主要来源。它们迫使孤子和反孤子的产生，它们分别立即破坏了沿着和垂直于台阶的长程有序。从加宽的时间演变来看，