太赫兹光谱探测富勒烯笼状分子中单个原子的振动
Rattling motion of a single atom in a fullerene cage molecule sensed by terahertz spectroscopy
摘要：
随着内嵌金属富勒烯（EMF）超原子态的发现，由于超原子的超快运动改变了富勒烯笼中的电荷分布，使得超原子的性质变得引人注目。然而，观察富勒烯笼中的超快原子运动是非常具有挑战性的，因为动力学过程发生在太赫兹（THz）频率范围内的皮米区域。在这里，我们报告的太赫兹光谱的单一Ce@C82 EMF分子通过使用单分子晶体管的几何形状。由于振动子辅助隧穿过程，在THz光谱中观察到两个宽的光电流峰，并归因于封装的单个Ce原子的弯曲和拉伸运动。这项工作表明，使用纳米间隙电极的THz光谱可以检测单个原子的运动，为皮米级的超快THz纳米科学打开了大门。
英文摘要：
Upon the discovery of the superatom states in endohedral metallofullerenes (EMFs), the superatom properties have become attractive, because ultrafast motion of the trapped atom modifies the charge distribution in the fullerene cage. However, the observation of ultrafast atom motion in the fullerene cage is very challenging, since dynamical processes take place in the terahertz (THz) frequency range in a picometer region. Here, we report on the THz spectroscopy of single Ce@C82 EMF molecules by using the single molecule transistor geometry. Due to the vibron-assisted tunneling process, two broad photocurrent peaks are observed in the THz spectra and are ascribed to the bending and stretching motions of the encapsulated single Ce atom. This work demonstrates that THz spectroscopy using nanogap electrodes can detect a motion of a single atom, opening a door to ultrafast THz nanoscience on the picometer-scale.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
