标题： 整数和分数量子霍尔效应 regime 中由空气桥柱栅形成的量子反点的库仑振荡 显示英文标题

标题： Coulomb oscillations of a quantum antidot formed by an airbridged pillar gate in the integer and fractional quantum Hall regime

摘要： 量子反点(QAD)在量子霍尔(QH)系统中对准粒子的操控具有吸引力。 在这里，我们使用一个带有空气桥连接的亚微米柱状栅极，在名义上的朗道能级填充因子$\nu$ = 2, 1 和 2/3 的整数和分数量子霍尔区域形成一个QAD。 在确认完全耗尽的QAD所需条件后，我们根据QAD的面积以及在相同栅压范围内的振荡周期的有效电荷来分析观察到的库仑振荡。 在$\nu$ = 2/3 时的面积明显小于在$\nu$ = 2 和 1 时的面积，这与之前的报告定性一致。 假设栅极电容恒定，$\nu$ = 2/3 时的有效电荷约为$\nu$ = 2 和 1 时的 2/3。 QAD器件可用于以 2e/3 为单位捕获和发射电荷。 显示英文摘要

摘要： Quantum antidots (QAD) are attractive for manipulating quasiparticles in quantum Hall (QH) systems. Here, we form a QAD in the integer and fractional QH regimes at nominal Landau-level filling factor $\nu$ = 2, 1, and 2/3 using a submicron pillar gate with an airbridge connection. After confirming the required conditions for a fully depleted QAD, we analyze the observed Coulomb oscillations in terms of the area of the QAD and the effective charge for the oscillation period in an identical gate voltage range. The area at $\nu$ = 2/3 is significantly smaller than that at $\nu$ = 2 and 1, in qualitative agreement with the previous report. By assuming a constant gate capacitance, the effective charge at $\nu$ = 2/3 is about 2/3 of that at $\nu$ = 2 and 1. The QAD device can be used to capture and emit charges in the unit of 2e/3.