Cotunneling in the v=5/2 fractional quantum Hall regime

Robert Zielke*, Bernd Braunecker, Daniel Loss

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

We show that cotunneling in the 5/2 fractional quantum Hall regime allows us 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 of the Moore-Read state. For comparison, we also consider cotunneling between Laughlin states, and find that electron transport between Moore-Read states and between Laughlin states at filling factor 1/3 have identical voltage dependences.

Original languageEnglish
Article number235307
Number of pages5
JournalPhysical Review. B, Condensed matter and materials physics
Volume86
Issue number23
DOIs
Publication statusPublished - 12 Dec 2012

Keywords

  • CHIRAL LUTTINGER LIQUID
  • EDGE EXCITATIONS
  • LANDAU-LEVEL
  • STATES
  • CHARGE

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