Probing the neutral edge modes in transport across a point contact via thermal effects in the read-rezayi non-abelian quantum hall states

Eytan Grosfeld, Sourin Das

Research output: Contribution to journalArticlepeer-review

19 Scopus citations

Abstract

Non-Abelian quantum Hall states are characterized by the simultaneous appearance of charge and neutral gapless edge modes, with the structure of the latter being intricately related to the existence of bulk quasiparticle excitations obeying non-Abelian statistics. Here we propose a scenario for detecting the neutral modes by having two point contacts in series separated by a distance set by the thermal equilibration length of the charge mode. We show that by using the first point contact as a heating device, the excess charge noise measured at the second point contact carries a nontrivial signature of the presence of the neutral mode. We also obtain explicit expressions for the thermal conductance and corresponding Lorentz number for transport across a quantum point contact between two edges held at different temperatures and chemical potentials.

Original languageEnglish
Article number106403
JournalPhysical Review Letters
Volume102
Issue number10
DOIs
StatePublished - 9 Mar 2009
Externally publishedYes

ASJC Scopus subject areas

  • General Physics and Astronomy

Fingerprint

Dive into the research topics of 'Probing the neutral edge modes in transport across a point contact via thermal effects in the read-rezayi non-abelian quantum hall states'. Together they form a unique fingerprint.

Cite this