论文标题
超导体上分子的共振增强振动光谱
Resonance-enhanced vibrational spectroscopy of molecules on a superconductor
论文作者
论文摘要
具有扫描隧道显微镜的分子振动光谱是可行的，但通常检测到很少的振动模式。我们利用从超导体上的分子观察到的尖锐的Yu-shiba-rusinov（YSR）状态，以显着增强振动信号。从铅邻苯烷蛋白分子46振动峰得以解决，从而可以与计算模式进行比较。确定了超出热拓宽极限的能量分辨率，并确定了邻居分子引起的移位或显微镜尖端的位置。反之亦然，振动模式的光谱用于测量电场对YSR状态能量的影响。该方法可能有助于进一步探测分子与环境的相互作用，并更好地理解振动激发的选择规则。
Molecular vibrational spectroscopy with the scanning tunneling microscope is feasible but usually detects few vibrational modes. We harness sharp Yu-Shiba-Rusinov (YSR) states observed from molecules on a superconductor to significantly enhance the vibrational signal. From a lead phthalocyanin molecule 46 vibrational peaks are resolved enabling a comparison with calculated modes. The energy resolution is improved beyond the thermal broadening limit and shifts induced by neighbor molecules or the position of the microscope tip are determined. Vice versa, spectra of vibrational modes are used to measure the effect of an electrical field on the energy of YSR states. The method may help to further probe the interaction of molecules with their environment and to better understand selection rules for vibrational excitations.
