New mechanism for single atom manipulation
New mechanism for single atom manipulation
复制标题
单原子操纵的新机制
DOI：
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发表时间：
2000
影响因子：
8.6
通讯作者：
K. Rieder
中科院分区：
文献类型：
--
作者：
J. Schulz;R. Koch;K. Rieder
扫描隧道显微镜（STM）对Ag（110）台阶粗糙化的研究表明，即使在典型的成像条件下，STM针尖也能从稳定的台阶中提取原子。单STM扫描的详细分析表明，迄今为止已知的横向操纵机制（推，拉，滑动）的帐户所观察到的原子提取。Ag原子更倾向于沿着尖端诱导的交换过程的能量有利路径，类似于先前提出的在fcc（110）表面上扩散的协调运动，包括亚稳态和因此实验上可检测的哑铃过渡态。
Scanning tunneling microscope (STM) investigations of the step roughening of Ag(110) have shown that the STM tip extracts atoms from otherwise stable steps even at typical imaging conditions. Detailed analyses of single STM scans reveal that none of the so far known lateral manipulation mechanisms (pushing, pulling, sliding) account for the observed atom extraction. The Ag atoms rather follow the energetically favorable path of a tip induced exchange process, similar to the concerted motion proposed previously for the diffusion on fcc(110) surfaces including a metastable and thus experimentally detectable dumbbell transition state.