Abstract

To investigate quantum nature of two dimensional electrons subject to high perpendicular magnetic fields, usually a planar electronic Fabry-Pérot interferometer is utilized. In this work, we investigate an interferometer defined on a curved heterostructure. In the presence of a magnetic field perpendicular to the cylindrical axis, the location and the properties of the edge channels depend on the radial component of the magnetic field. Considering a curved structure, we perform numerical and semi-analytical calculations to determine widths of the incompressible edge states. We observe that the edge states form a closed loop for certain magnetic field strengths yielding observation of conductance oscillations, which can be manipulated by changing the Azimuthal angle mechanically. In addition, we investigate the effect of spin polarization on the edge state distribution considering Zeeman splitting and obtained odd integer edge states. The proposed experiment would yield a novel method to clarify the ongoing debate on the origin of conductance oscillations, namely whether they stem from Aharonov-Bohm phase or charging effects.

Graphical abstract

中文翻译：

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在弯曲的2DEG上定义的机械控制量子开关

摘要

为了研究承受高垂直磁场的二维电子的量子性质，通常使用平面电子Fabry-Pérot干涉仪。在这项工作中，我们研究了在弯曲异质结构上定义的干涉仪。在垂直于圆柱轴的磁场的存在下，边缘通道的位置和属性取决于磁场的径向分量。考虑到弯曲的结构，我们执行数值和半分析计算以确定不可压缩边缘状态的宽度。我们观察到，边缘状态对于某些磁场强度形成了一个闭环，从而产生了电导振荡的观察结果，可以通过机械地改变方位角来操纵该振荡。此外，考虑塞曼分裂，我们研究了自旋极化对边缘状态分布的影响，并获得了奇数整数边缘状态。拟议的实验将产生一种新颖的方法，以澄清正在进行的关于电导振荡起源的争论，即电导振荡是源于Aharonov-Bohm相位还是电荷效应。

图形概要