RESISTANCE FLUCTUATIONS IN THE QUANTUM HALL REGIME
RESISTANCE FLUCTUATIONS IN THE QUANTUM HALL REGIME
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DOI：
10.1103/physrevb.50.4450
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发表时间：
1994-08-15
影响因子：
3.7
通讯作者：
LINDELOF, PE
中科院分区：
文献类型：
--
作者：
MAIN, PC;GEIM, AK;LINDELOF, PE
我们测量了由高迁移率二维电子气制成的长（>50μm）、窄（类似于1μm）量子线的低温磁阻。在高磁场的量子霍尔体系中，我们观察到舒布尼科夫-德哈斯振荡分裂成一系列非周期性尖峰。峰值的幅度和锐度都强烈依赖于 1 K 以下的温度。我们将峰值归因于边缘态之间通过体中局域态的共振隧道效应。结果与 Jain 和 Kivelson 的理论模型定量一致。
We have measured the low-temperature magnetoresistance of long (>50 mu m), narrow (similar to 1 mu m) quantum wires fabricated from a high-mobility two-dimensional electron gas. In the quantum Hall regime at high magnetic fields we observe that the Shubnikov-de Haas oscillations split into a series of aperiodic sharp peaks. Both the amplitude and sharpness of the peaks are strongly dependent on temperature below 1 K. We attribute the peaks to resonant tunneling between edge states through localized states in the bulk. The results are in quantitative agreement with the theoretical model of Jain and Kivelson.