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arXiv 1006.0908cond-mat.mes-hall
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CdTe中的分数量子霍尔效应

Fractional quantum Hall effect in CdTe

B. A. Piot, J. Kunc, M. Potemski, D. K. Maude, C. Betthausen, A. Vogl, D. Weiss, G. Karczewski, T. Wojtowicz

摘要:

报道了mK温度下高迁移率CdTe量子阱中的分数量子霍尔效应。在填充因子为4/3和5/3时观察到充分发展的H3 OH态,发现它们都是自旋极化的基态,其最低能量激发不是自旋翻转。这可以通过该单谷2D电子气中相对高的固有塞曼能量来解释。在填充因子为7/3和8/3的第一激发态(N=1)朗道能级中也观察到了中间温度下的最小值。

英文摘要:

The fractional quantum Hall (FQH) effect is reported in a high mobility CdTe quantum well at mK temperatures. Fully-developed FQH states are observed at filling factor 4/3 and 5/3 and are found to be both spin-polarized ground state for which the lowest energy excitation is not a spin-flip. This can be accounted for by the relatively high intrinsic Zeeman energy in this single valley 2D electron gas. FQH minima are also observed in the first excited (N=1) Landau level at filling factor 7/3 and 8/3 for intermediate temperatures.

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