论文标题
石墨烯 - 铁烯 - 格拉烯连接处的谐振隧道
Resonant tunneling in graphene-ferroelectric-graphene junctions
论文作者
论文摘要
我们研究了由石墨烯电极之间夹杂的二维铁电（Fe）材料组成的隧道连接。考虑到量子电容效应，我们为Fe极化的相互作用和在此类设备中引起的自由电荷的理论提出了理论。我们预测整个设备上的栅极敏感电压差，可以使用静电力显微镜进行测量。将这种静电理论纳入隧道电流 - 电压特性中，我们将与对齐的狄拉克锥相关的谐振峰是对结的高度敏感探针。这为几乎没有原子厚的Fe层的设备应用程序打开了道路，该层充当可读性的超高密度内存。
We study tunnel junctions consisting of a two-dimensional ferroelectric (FE) material sandwiched between graphene electrodes. We formulate a theory for the interplay of the FE polarization and induced free charges in such devices, taking into account quantum capacitance effects. We predict a gate-sensitive FE voltage difference across the device, which can be measured using electrostatic force microscopy. Incorporating this electrostatic theory in the tunneling current-voltage characteristics, we identify a resonance peak associated with aligned Dirac cones as a highly sensitive probe of the FE polarization of the junction. This opens the way for device applications with few atom-thick FE layers acting as readable ultra-high-density memory.
