Cotunneling in the 5/2 fractional quantum Hall regime

Details Cotunneling in the 5/2 fractional quantum Hall regime Cotunneling in the 5/2 fractional quantum Hall regime

2012-04-19

arxiv.org/abs/1204.4400v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

4 pages, 2 figures

Scientific paper

We show that cotunneling in the 5/2 fractional quantum Hall regime allows to test the Moore-Read wave function, proposed for this regime, and to probe the nature of the fractional charge carriers. We calculate the cotunneling current for electrons that tunnel between two quantum Hall edge states via a quantum dot and for quasiparticles with fractional charges e/4 and e/2 that tunnel via an antidot. While electron cotunneling is strongly suppressed, the quasiparticle tunneling shows signatures characteristic for the Moore-Read state. For comparison, we also consider cotunneling between Laughlin states, and find that electron-transport between Moore-Read states and the one between Laughlin states at filling factor 1/3 have identical voltage dependences.

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