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arXiv 1108.3142cond-mat.str-elcond-mat.mes-hall
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$ν=5/2$分数量子霍尔态的无序展宽和本征能隙的定量分析

Quantitative Analysis of the Disorder Broadening and the Intrinsic Gap for the $ν=5/2$ Fractional Quantum Hall State

N. Samkharadze, J. D. Watson, G. Gardner, M. J. Manfra, L. N. Pfeiffer, K. W. West, G. A. Csáthy

摘要:

我们报道了一种可靠的方法来估计无序加宽参数的第二朗道能级的偶数和主要奇数分母分数量子霍尔态的间隙的标度。我们将这种技术应用于几个不同密度的样品,并在不同的MBE室中生长。极好的协议之间的估计固有的和数值计算得到的$ν=5/2$分数量子霍尔态的能隙。此外,我们量化,第一次,在$ν=5/2$的内在差距的依赖朗道能级混合。

英文摘要:

We report a reliable method to estimate the disorder broadening parameter from the scaling of the gaps of the even and major odd denominator fractional quantum Hall states of the second Landau level. We apply this technique to several samples of vastly different densities and grown in different MBE chambers. Excellent agreement is found between the estimated intrinsic and numerically obtained energy gaps for the $ν=5/2$ fractional quantum Hall state. Futhermore, we quantify, for the first time, the dependence of the intrinsic gap at $ν=5/2$ on Landau level mixing.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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