Abstract
Inspired by the fourfold spin-valley symmetry of relativistic electrons in graphene, we investigate a possible fractional quantum Hall effect, which may also arise in bilayer semiconductor quantum Hall systems with small Zeeman gap. generalizations of Halperin’s wave functions [Helv. Phys. Acta 56, 75 (1983)], which may break differently the original symmetry, are studied analytically and compared, at , to exact-diagonalization studies.
- Received 1 May 2007
DOI:https://doi.org/10.1103/PhysRevB.75.241405
©2007 American Physical Society