论文标题
在栅极定义的量子点中，双层石墨烯中shubnikov-de-haas振荡的静电检测
Electrostatic detection of Shubnikov-de-Haas oscillations in bilayer graphene by Coulomb resonances in gate-defined quantum dots
论文作者
论文摘要
双层石墨烯中的栅极定义的量子点被用作敏感的电表，以探测其环境的电荷密度。在垂直磁场的影响下，由于Landau水平的形成，量子点旁边的通道区域的电荷载体密度振荡。这是在实验上被认为是附近量子点的库仑共振的栅极 - 电压位置的振荡。从振荡的频率中，我们提取通道中的电荷载体密度，并从振幅中提取量子点电位的移位。我们将这些实验结果与设备的静电模拟进行了比较，并找到良好的一致性。
A gate-defined quantum dot in bilayer graphene is utilized as a sensitive electrometer for probing the charge density of its environment. Under the influence of a perpendicular magnetic field, the charge carrier density of the channel region next to the quantum dot oscillates due to the formation of Landau levels. This is experimentally observed as oscillations in the gate-voltage positions of the Coulomb resonances of the nearby quantum dot. From the frequency of the oscillations, we extract the charge carrier density in the channel and from the amplitude the shift of the quantum dot potential. We compare these experimental results with an electrostatic simulation of the device and find good agreement.
