Unusual Landau Level Pinning and Correlated $\nu =1$ Quantum Hall Effect in Hole Systems Confined to Wide GaAs Quantum Wells

Abstract

In two-dimensional hole systems confined to wide GaAs quantum wells, where the heavy- and light- hole states are close in energy, we observe a very unusual crossing of the lowest two Landau levels as the sample is tilted in magnetic field. At a magic tilt angle $\theta \simeq 34^{\circ }$, which surprisingly is independent of the well-width or hole density, in a large filling factor range near $\nu =1$ the lowest two levels are nearly degenerate as evinced by the presence of two-component quantum Hall states. Remarkably, a quantum Hall state is seen at $\nu =1$, consistent with a \textit{correlated} ${\Psi }_{111}$ state.

References in corpus (2)

• $\nu =1/2$ Fractional Quantum Hall Effect in Tilted Magnetic Fields
• Interaction and disorder in bilayer counterflow transport at filling factor one

Cited by in corpus (8)

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• Geometric Resonance of Composite Fermions near Bilayer Quantum Hall States
• Robust Quantum Hall Ferromagnetism near a Gate-Tuned ν = 1 Landau Level Crossing
• Spin Reversal of a Quantum Hall Ferromagnet at a Landau Level Crossing
• Observation of An Anisotropic Wigner Crystal
• Highly-Anisotropic Even-Denominator Fractional Quantum Hall State in an Orbitally-Coupled Half-Filled Landau Level
• Morphing of 2D Hole Systems at $\nu =3/2$ in Parallel Magnetic Fields: Compressible, Stripe, and Fractional Quantum Hall Phases
• Cascade of fractional quantum Hall states in 2D system