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

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

2011-02-28

arxiv.org/abs/1102.5666v2

Phys. Rev. Lett. 107, 146404 (2011)

Physics

Condensed Matter

Strongly Correlated Electrons

5 pages, 2 figures

Scientific paper

10.1103/PhysRevLett.107.146404

We explain effective charge anomalies recently observed for fractional quantum Hall edge states at $\nu=5/2$ [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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