2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/130373Inspired by the four-fold spin-valley symmetry of relativistic electrons in graphene, we investigate a possible SU(4) fractional quantum Hall effect, which may also arise in bilayer semiconductor quantum Hall systems with small Zeeman gap. SU(4) generalizations of Halperin's wave functions [Helv. Phys. Acta 56, 75 (1983)], which may break differently the original SU(4) symmetry, are studied analytically and compared, at nu=2/3, to exact-diagonalization studies.4+epsilon pages, 4 figures; published version with minor correctionsMesoscale and Nanoscale PhysicsStrongly Correlated Electronstext