Hysteresis and Spin Transitions in the Fractional Quantum Hall Effect
Hysteresis and Spin Transitions in the Fractional Quantum Hall Effect
复制标题
分数量子霍尔效应中的磁滞和自旋跃迁
DOI：
10.1103/physrevlett.81.2522
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发表时间：
1998
影响因子：
8.6
通讯作者：
W. Wegscheider
中科院分区：
文献类型：
--
作者：
H. Cho;J. Young;W. Kang;K. Campman;A. Gossard;M. Bichler;W. Wegscheider
在分数量子霍尔效应中，我们观察到了与自旋跃迁相关的滞后行为。剧烈的磁滞现象在磁场上下扫描时发生在偶数分子的自旋极化态到自旋非极化态的跃迁附近。滞后现象在最低温度下最明显，并随着温度的升高而消失。这些结果表明，在紧密接近的自旋跃迁的ECOHE状态表现出亚稳性。我们讨论了我们的研究结果，在最近提出的铁磁排序与近简并朗道水平。
We have observed hysteretic behavior associated with spin transitions in the fractional quantum Hall effect (FQHE). Dramatic hysteresis in up and down sweeps of the magnetic field occurs in the vicinity of the spin-polarized to spin-unpolarized transitions in even-numerator FQHE states. The hysteresis is most pronounced at the lowest temperatures and disappears as the temperature is raised. These results suggest that the FQHE states exhibit metastability in close proximity of the spin transitions. We discuss our findings in terms of a recent proposal of ferromagnetlike ordering associated with nearly degenerate Landau levels.