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Molecular and atomic manipulation mediated by electronic excitation of the underlying Si(111)-7x7 surface

机译：通过电子激发介导的底层Si（111）-7x7表面介导的分子和原子操纵

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We report the local atomic manipulation properties of chemisorbed toluene molecules on the Si(111)-7x7 surface and of the silicon adatoms of the surface. Charge injected directly into the molecule, or into its underlying bonding silicon adatom, can induce the molecule to change bonding site. The voltage dependence of the rates of these processes match closely with scanning tunnelling spectroscopy of the toluene and adatom species. The branching ratio between toluene molecules which are moved to a neighbouring site, or those that travel further is invariant to voltage, suggesting a common final manipulation step for both injection into the molecule and into the bonding adatom site. At low temperatures the rate of silicon adatom manipulation matches that of toluene manipulation, further suggesting that all these manipulation processes are driven by electronic excitation of the underlying silicon surface. Our results therefore suggest that a common non-adiabatic process mediates atomic and molecular manipulation induced by the STM on the Si(111)-7x7 surface and may also mediate similar manipulation induced by the laser irradiation of the Si(111)-7x7 surface.
机译：我们在Si（111）-7x7表面和表面的硅染色剂的表面上报告了化学吸附甲苯分子的局部原子操纵性能。将直接注入分子中的电荷或进入其下面的粘合硅Adatom，可以诱导分子改变粘合位点。这些方法的速率的电压依赖性与甲苯和Adatom物种的扫描隧道光谱密切相关。甲苯分子之间的支化比移动到相邻部位，或者进一步行进的那些载入到电压中的那些，表明用于注射到分子中并进入粘合ADATOM位点的常见最终操纵步骤。在低温下，硅ADATOM操作的速率与甲苯操作的速率匹配，进一步暗示所有这些操纵过程通过底层硅表面的电子激发驱动。因此，我们的研究结果表明，常见的非绝热过程介导由Si（111）-7x7表面上的STM诱导的原子和分子操纵，并且还可以介导通过Si（111）-7x7表面的激光照射引起的类似操纵。

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