论文标题
基于GD@C82基于可切换电化的单分子electret设备
A Gd@C82-based single molecular electret device with switchable electrical polarization
论文作者
论文摘要
长期以来，表现出具有单分子电动极化开关的单分子elecular elecular electors是极小的非挥发储存设备的平台，尽管它是有争议的，因为单分子电偶极子的稳定性较差。在这里，我们研究了GDC82的单个分子装置，其中封装的GD原子形成了电荷中心，我们观察到两组单电子传输稳定性图之间的栅极控制的开关行为。开关以滞后环的强制性栅场为0.5VNM。理论计算将两个电导图分配给了两个状态的相应能量水平，即GD原子被困在C82笼的两个不同位点，它们具有两个不同的永久性电偶极取向。这两个偶极状态通过各向异性能量稳定，并通过70 MeV的过渡能屏障隔开。然后，将这种切换访问到电场驱动的单个偶极子的重新定位，同时通过强制性门场克服障碍，并演示了单个分子elector的创建。
Single molecular electrets exhibiting single molecule electric polarization switching have been long desired as a platform for extremely small non-volatile storage devices, although it is controversial because of the poor stability of single molecular electric dipoles. Here we study the single molecular device of GdC82, where the encapsulated Gd atom forms a charge center, and we have observed a gate controlled switching behavior between two sets of single electron transport stability diagrams. The switching is operated in a hysteresis loop with a coercive gate field of around 0.5Vnm. Theoretical calculations have assigned the two conductance diagrams to corresponding energy levels of two states that the Gd atom is trapped at two different sites of the C82 cage, which possess two different permanent electrical dipole orientations. The two dipole states are stabilized by the anisotropic energy and separated by a transition energy barrier of 70 meV. Such switching is then accessed to the electric field driven reorientation of individual dipole while overcoming the barriers by the coercive gate field, and demonstrates the creation of a single molecular electret.
