$\nu =1/2$ Fractional Quantum Hall Effect in Tilted Magnetic Fields

Abstract

Magnetotransport measurements on two-dimensional electrons confined to wide GaAs quantum wells reveal a remarkable evolution of the ground state at filling factor $\nu =1/2$ as we tilt the sample in the magnetic field. Starting with a compressible state at zero tilt angle, a strong $\nu =1/2$ fractional quantum Hall state appears at intermediate angles. At higher angles an insulating phase surrounds this state and eventually engulfs it at the highest angles. This evolution occurs because the parallel component of the field renders the charge distribution increasingly bilayer-like.

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Cited by in corpus (18)

• Even-Denominator Fractional Quantum Hall State at Filling Factor ν = 3/4
• Geometric Resonance of Composite Fermions near Bilayer Quantum Hall States
• Theory of Generalized Landau Levels and Implication for non-Abelian States
• Topological phase transition between composite-fermion and Pfaffian daughter states near ν = 1/2 FQHS
• Origin of the $\nu =1/2$ fractional quantum Hall effect in wide quantum wells
• Observation of An Anisotropic Wigner Crystal
• Anisotropic composite fermions and fractional quantum Hall effect
• Paired fermions in strong magnetic fields and daughters of even-denominator Hall plateaus
• Microwave spectroscopic observation of a Wigner solid within the 1/2 fractional quantum Hall effect
• Unusual Landau Level Pinning and Correlated $\nu =1$ Quantum Hall Effect in Hole Systems Confined to Wide GaAs Quantum Wells
• Valley-tunable, even-denominator fractional quantum Hall state in the lowest Landau level of an anisotropic system
• Search for Composite Fermions at Filling Factor 5/2: Role of Landau Level and Subband Index
• Collective excitations of quantum Hall states under tilted magnetic field
• Composite fermions in a wide quantum well in the vicinity of the filling factor 1/2
• Non-Abelian $\nu =1/2$ quantum Hall state in ${\Gamma }_8$ Valence Band Hole Liquid
• Fractional quantum Hall state at $\nu =1/2$ with energy gap up to 6 K, and possible transition from one- to two-component state
• Wigner solids of wide quantum wells near Landau filling $\nu =1$
• Edge reconstruction of compressible Quantum Hall fluid in the filling fraction range 1/3 to 2/3