论文标题
Franck-Condon模型以外的隧道光谱中的振动激发机制
Vibrational excitation mechanism in tunneling spectroscopy beyond the Franck-Condon model
论文作者
论文摘要
分子的振动光谱通常在弗朗克 - 康登模型中描述。在这里，我们表明，在Au（111）上的单层Mos $ _ {2} $上的大型有机分子的高度分辨率的振动光谱显示其强度的空间变化，这在这张图片中无法捕获。我们解释说，分子波函数的振动介导的扰动需要包括在弗朗克 - 康登模型中。我们的简单模型计算在STM尖端在分子上的任意位置重现了实验光谱。
Vibronic spectra of molecules are typically described within the Franck-Condon model. Here, we show that highly resolved vibronic spectra of large organic molecules on a single layer of MoS$_{2}$ on Au(111) show spatial variations in their intensities, which cannot be captured within this picture. We explain that vibrationally mediated perturbations of the molecular wave functions need to be included into the Franck-Condon model. Our simple model calculations reproduce the experimental spectra at arbitrary position of the STM tip over the molecule in great detail.
