Multi-component fractional quantum Hall states in graphene

SU(4) versus SU(2)

C. Töke, J. K. Jain

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Because of the spin and Dirac-valley degrees of freedom, graphene allows the observation of one-, two-or four-component fractional quantum Hall effects in different parameter regions. We address the stability of various states in the SU(2) and SU(4) limits. In the SU(4) limit, we predict that new low-energy Goldstone modes determine the stability of the fractional quantum Hall states at 2/5, 3/7, etc; SU(4) skyrmions are not found to be relevant for the low-energy physics. These results are discussed in light of experiments.

Original languageEnglish
Article number235601
JournalJournal of Physics Condensed Matter
Volume24
Issue number23
DOIs
Publication statusPublished - Jun 13 2012

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Graphene
graphene
Quantum Hall effect
quantum Hall effect
valleys
Physics
degrees of freedom
physics
energy
Experiments

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Materials Science(all)

Cite this

Multi-component fractional quantum Hall states in graphene : SU(4) versus SU(2). / Töke, C.; Jain, J. K.

In: Journal of Physics Condensed Matter, Vol. 24, No. 23, 235601, 13.06.2012.

Research output: Contribution to journalArticle

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