Composite fermion hofstadter problem: Partially polarized density wave states in the ν = 2/5 fractional quantum hall effect

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39 Scopus citations

Abstract

It is well known that the ν = 2/5 state is unpolarized at zero Zeeman energy, while it is fully polarized at large Zeeman energies. A novel state with a charge/spin density wave order for composite fermions is proposed to exist at intermediate values of the Zeeman coupling for ν = 2/5. This state has half the maximum possible polarization, and can be extended to other incompressible fractions. A Hartree-Fock calculation based on the new approach for all fractional quantum Hall states developed by R. Shankar and the author is used to demonstrate the stability of this state to single-particle excitations and to compute gaps. A very recent experiment shows direct evidence for this state.

Original languageEnglish
Pages (from-to)350-353
Number of pages4
JournalPhysical Review Letters
Volume84
Issue number2
DOIs
StatePublished - 2000

ASJC Scopus subject areas

  • General Physics and Astronomy

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