Fermi contour anisotropy of GaAs electron-flux composite fermions in parallel magnetic fields
Fermi contour anisotropy of GaAs electron-flux composite fermions in parallel magnetic fields
In high-quality two-dimensional electrons confined to GaAs quantum wells, near Landau level filling factors $\ensuremath{\nu}=1/2$ and 1/4, we observe signatures of the commensurability of the electron-flux composite fermion cyclotron orbits with a unidirectional periodic density modulation. Focusing on the data near $\ensuremath{\nu}=1/2$, we directly and quantitatively probe the shape of …