Liquid-crystal phases of quantum hall systems

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Mean-field calculations for the two-dimensional electron gas in a large magnetic field with a partially filled Landau level with index N≥2 consistently yield "stripe-ordered" charge-density wave ground states, for much the same reason that frustrated phase separation leads to stripe-ordered states in doped Mott insulators. We have studied the effects of quantum and thermal fluctuations about such a state and show that they can lead to a set of electronic liquid crystalline states, particularly a stripe-nematic phase, which is stable at T>0. Recent measurements of the longitudinal resistivity of a set of quantum Hall devices have revealed that these systems spontaneously develop, at low temperatures, a very large anisotropy. We interpret these experiments as evidence for a stripe nematic phase, and propose a general phase diagram for this system.

Original languageEnglish (US)
Pages (from-to)8065-8072
Number of pages8
JournalPhysical Review B - Condensed Matter and Materials Physics
Issue number12
StatePublished - 1999

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics


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