Edge-State Velocity and Coherence in a Quantum Hall Fabry-Peacuterot Interferometer
Edge-State Velocity and Coherence in a Quantum Hall Fabry-Peacuterot Interferometer
复制标题
DOI：
10.1103/physrevlett.103.206806
复制
发表时间：
2009-11-13
影响因子：
8.6
通讯作者：
West, K. W.
中科院分区：
文献类型：
--
作者：
McClure, D. T.;Zhang, Yiming;West, K. W.
我们研究了整数量子霍尔体系中电子法布里-皮克特罗干涉仪的非线性输运。对于足够大以至于不存在库仑阻塞效应的干涉仪，可以观察到作为直流偏置和垂直磁场函数的电导振荡的棋盘状图案。从棋盘数据中提取的边缘状态速度与模型计算进行了比较，发现与从低场跳跃轨道到高场 ExB 漂移的交叉一致。作为偏置和磁场函数的能见度抑制是通过包括边缘电子的能量和场相关相移来解释的。
We investigate nonlinear transport in electronic Fabry-Peacuterot interferometers in the integer quantum Hall regime. For interferometers sufficiently large that Coulomb blockade effects are absent, a checkerboardlike pattern of conductance oscillations as a function of dc bias and perpendicular magnetic field is observed. Edge-state velocities extracted from the checkerboard data are compared to model calculations and found to be consistent with a crossover from skipping orbits at low fields to ExB drift at high fields. Suppression of visibility as a function of bias and magnetic field is accounted for by including energy- and field-dependent dephasing of edge electrons.