Correlation-hole induced paired quantum Hall states in lowest Landau level

Details Correlation-hole induced paired quantum Hall states in lowest Landau level Correlation-hole induced paired quantum Hall states in lowest Landau level

2009-11-09

arxiv.org/abs/0911.1775v3

Phys. Rev. Lett. 105, 216801 (2010)

Physics

Condensed Matter

Strongly Correlated Electrons

4 pages, 2 figures; published version

Scientific paper

A theory is developed for the paired even-denominator fractional quantum Hall states in the lowest Landau level. We show that electrons bind to quantized vortices to form composite fermions, interacting through an exact instantaneous interaction that favors chiral p-wave pairing. Two canonically dual pairing gap functions are related by the bosonic Laughlin wavefunction (Jastraw factor) due to the correlation holes. We find that the ground state is the Moore-Read pfaffian in the long wavelength limit for weak Coulomb interactions, a new pfaffian of an oscillatory pairing function for intermediate interactions, and a Read-Rezayi composite Fermi liquid beyond a critical interaction strength. Our findings are consistent with recent experimental observations of the 1/2 and 1/4 fractional quantum Hall effects in asymmetric wide quantum wells.

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