Particle-hole symmetry breaking and the ν= 5 2 fractional quantum Hall effect

Hao Wang, D. N. Sheng, F. D.M. Haldane

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59 Scopus citations

Abstract

We report on the study of the fractional quantum Hall effect at the filling factor 5/2 using exact diagonalization method with torus geometry. The particle-hole symmetry breaking effect is considered using an additional three-body interaction. Both Pfaffian and anti-Pfaffian states can be the ground state depending on the sign of the three-body interaction. The results of the low-energy spectrum, the wave function overlap, and the particle-hole parity evolution, have shown clear evidence of a direct sharp transition (possibly first order) from the Pfaffian to the anti-Pfaffian state at the Coulomb point. A quantum phase diagram is established, where one finds further transitions from the Pfaffian or anti-Pfaffian state to the nearby compressible phases induced by a change of the pseudopotential.

Original languageEnglish (US)
Article number241311
JournalPhysical Review B - Condensed Matter and Materials Physics
Volume80
Issue number24
DOIs
StatePublished - Dec 23 2009

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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