Details

Autor(en) / Beteiligte

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

Titel

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

Ist Teil von

• Physical review letters, 2011-09, Vol.107 (14), p.146404-146404, Article 146404

Ort / Verlag

United States

Erscheinungsjahr

2011

Quelle

PROLA

Beschreibungen/Notizen

• 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 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.