Microscopic theory of fractional excitations in gapless bilayer quantum Hall states: semi-quantized quantum Hall states
arXiv:1910.10626 · doi:10.21468/SciPostPhys.8.2.031
Abstract
We derive the low-energy theory of semi-quantized quantum Hall states, a recently observed class of gapless bilayer fractional quantum Hall states. Our theory shows these states to feature gapless quasiparticles of fractional charge coupled to an emergent Chern-Simons gauge field. These gapless quasiparticles can be understood as composites of electrons and Laughlin-like quasiparticles. We show that semi-quantized quantum Hall states exhibit perfect interlayer drag, host non-Fermi liquid physics, and serve as versatile parent states for fully gapped topological phases hosting anyonic excitations.
33 pages
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