Anomalous Charge Tunneling in Fractional Quantum Hall Edge States at a Filling Factor ν=5/2

被引：43

作者：

Carrega, M. ^{[1
,2
]}

Ferraro, D. ^{[3
,4
,5
]}

Braggio, A. ^{[4
]}

Magnoli, N. ^{[3
,5
]}

Sassetti, M. ^{[3
,4
]}

机构：

[1] Ist Nanosci CNR, NEST, I-56126 Pisa, Italy

[2] Scuola Normale Super Pisa, I-56126 Pisa, Italy

[3] Univ Genoa, Dipartimento Fis, I-16146 Genoa, Italy

[4] CNR SPIN, I-16146 Genoa, Italy

[5] Ist Nazl Fis Nucl, Sez Genova, I-16146 Genoa, Italy

来源：

PHYSICAL REVIEW LETTERS | 2011年 / 107卷 / 14期

基金：

欧盟第七框架计划;

关键词：

LANDAU-LEVEL; TRANSPORT; NOISE;

D O I：

10.1103/PhysRevLett.107.146404

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

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 81, 161303(R) (2010)]. The experimental data of differential conductance and excess noise are fitted, using the anti-Pfaffian model, by properly taking 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 the expected e/4 charge, dominates the transport properties at low energies.

引用

页数：5

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