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 θ≃ 34^∘, which surprisingly is independent of the well-width or hole density, in a large filling factor range near ν=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 ν=1, consistent with a \textit{correlated} Ψ₁₁₁ state.