The universal edge physics in fractional quantum hall liquids

Zi Xiang Hu, R. N. Bhatt, Xin Wan, Kun Yang

Research output: Contribution to journalConference article

1 Scopus citations

Abstract

The chiral Luttinger liquid theory for fractional quantum Hall edge transport predicts universal power-law behavior in the current-voltage (I-V) characteristics for electrons tunneling into the edge. However, it has not been unambiguously observed in experiments in two-dimensional electron gases based on GaAs/GaAlAs heterostructures or quantum wells. One plausible cause is the fractional quantum Hall edge reconstruction, which introduces non-chiral edge modes. The coupling between counterpropagating edge modes can modify the exponent of the I-V characteristics. By comparing the v = 1/3 fractional quantum Hall states in modulation-doped semiconductor devices and in graphene devices, we show that the graphene-based systems have an experimental accessible parameter region to avoid the edge reconstruction, which is suitable for the exploration of the universal edge tunneling exponent predicted by the chiral Luttinger liquid theory.

Original languageEnglish (US)
Article number012017
JournalJournal of Physics: Conference Series
Volume402
Issue number1
DOIs
StatePublished - Jan 1 2012
Event23rd Conference on Computational Physics, CCP 2011 - Gatlinburg, TN, United States
Duration: Oct 30 2012Nov 3 2012

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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