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arXiv 1102.5666cond-mat.str-elcond-mat.mes-hall
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填充因子ν= 5/2时分数量子霍尔边缘态的反常电荷隧穿

Anomalous charge tunneling in the fractional quantum Hall edge states at filling factor ν= 5/2

M. Carrega, D. Ferraro, A. Braggio, N. Magnoli, M. Sassetti

摘要:

我们解释了最近在$ν=5/2$ [M. Dolev,Y.真恶心Y C. Chung,M. Heiblum,V. Umansky,and D. Mahalu,Phys.Rev. B. \textbf{81},161303(R)(2010)]。微分电导和过量噪声的实验数据进行拟合,使用反Pfronan模型,通过适当地考虑重整化的Luttinger参数诱导的耦合系统的固有$1/f$噪声。我们表明,一个奇特的凝聚物激发与电荷$e/2$,预期的$e/4$电荷的两倍,占主导地位的低能量下的输运性质。

英文摘要:

We explain effective charge anomalies recently observed for fractional quantum Hall edge states at $ν=5/2$ [M. Dolev, Y. Gross, Y. C. Chung, M. Heiblum, V. Umansky, and D. Mahalu, Phys.Rev. B. \textbf{81}, 161303(R) (2010)]. The experimental data of differential conductance and excess noise are fitted, using the anti-Pfaffian model, by properly take into account renormalizations of the Luttinger parameters induced by the coupling of the system with an intrinsic $1/f$ noise. We demonstrate that a peculiar agglomerate excitation with charge $e/2$, double of the expected $e/4$ charge, dominates the transport properties at low energies.

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