Aharonov-Bohm-type oscillations in antidot lattices in the quantum Hall regime
Aharonov-Bohm-type oscillations in antidot lattices in the quantum Hall regime
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DOI：
10.1103/physrevb.77.155318
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发表时间：
2008-04-01
影响因子：
3.7
通讯作者：
Iye, Yasuhiro
中科院分区：
文献类型：
--
作者：
Kato, Masanori;Endo, Akira;Iye, Yasuhiro
本文研究了量子霍尔（QH）体系中反点晶格中Aharonov-Bohm（AB）型效应的各个方面。在nu=2 [nu是朗道能级（LL）填充因子] QH态附近观察到与反点周围形成的自旋分辨边缘通道相关的特征。在nu=2 QH态的高场一侧观察到了周期在h/2 e和h/3e之间的AB型振荡。这种现象基本上被解释为H/2 E振荡先前报道的单antidot系统，但与特定的antidot阵列系统的重要修改。通过调整负的前栅极偏置，不同的制度的内部和内部LL隧道的相对重要性进行了探讨。
Various aspects of the Aharonov-Bohm(AB)-type effects in antidot lattices in the quantum Hall (QH) regime are studied. Features associated with spin-resolved edge channels formed around the antidots are observed in the vicinity of the nu=2 [nu being the Landau level (LL) filling factor] QH state. AB-type oscillations with anomalous periodicities lying between h/2e and h/3e are observed on the higher field side of the nu=2 QH state. The phenomenon is interpreted basically as h/2e oscillation reported earlier for single antidot systems, but with important modification specific to the antidot array system. By tuning the negative front gate bias, different regimes of relative importance of the intra- and inter-LL tunnelings are explored.