论文标题
dephasing效果促进了量化的霍尔高原的外观
Dephasing effect promotes the appearance of quantized Hall plateaus
论文作者
论文摘要
量子厅效应（QHE）是一种受拓扑保护的现象，在各种系统中都观察到。在实验中，要意识到QHE的大小比相干长度大得多，在该长度上，电子的量子相干性被破坏了。在这里，我们从理论上研究了脱态效应对量化大厅（QH）高原的影响。我们发现，如果铅和中央区域之间的耦合不完善，则QH高原在完美的量子相干系统中消失。在这种情况下，大厅的阻力非常大，并且强烈振荡，而不是呈现QH高原。然而，通过引入除多式，大厅的阻力会降低，QH高原逐渐出现。对于量子异常效应也可以观察到相似的结果。我们的结果表明，脱离效应促进了QH Plateaus的外观，该效应开辟了对拓扑系统的脱去效应的新主题。
The quantum Hall effect (QHE) is a topologically protected phenomenon which has been observed in various systems. In experiments, the size of Hall bar device to realize the QHE is generally much larger than the phase coherence length, in which the quantum coherence of electrons is destroyed. Here, we theoretically study the influence of dephasing effect on the quantized Hall (QH) plateaus. We find that the QH plateau disappears in perfectly quantum coherent systems if the coupling between leads and central region is imperfect. The Hall resistance is very large and strongly oscillates instead of presenting the QH plateau in this case. However, by introducing the dephasing, the Hall resistance decreases and the QH plateau appears gradually. Similar results can also be observed for the quantum anomalous Hall effect. Our results propose that dephasing effect promotes the appearance of QH plateaus, which opens a new topic of the dephasing effect on topological systems.
