To refer to this page use:
|Abstract:||In high-quality two-dimensional electrons confined to GaAs quantum wells, near Landau level filling factors ν=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 ν=1/2, we directly and quantitatively probe the shape of the composite fermions' cyclotron orbit, and therefore their Fermi contour, as a function of magnetic field (B) applied parallel to the sample plane. The composite fermion Fermi contour becomes severely distorted with increasing B and appears to be elliptical, in sharp contrast to the electron Fermi contour which splits as the system becomes bilayerlike at high B. We present a simple, qualitative model to interpret our findings.|
|Electronic Publication Date:||11-Feb-2014|
|Citation:||Kamburov, D, Mueed, MA, Shayegan, M, Pfeiffer, LN, West, KW, Baldwin, KW, Lee, JJD, Winkler, R. (2014). Fermi contour anisotropy of GaAs electron-flux composite fermions in parallel magnetic fields. Physical Review B, 89 (8), 10.1103/PhysRevB.89.085304|
|Type of Material:||Journal Article|
|Journal/Proceeding Title:||Physical Review B|
Items in OAR@Princeton are protected by copyright, with all rights reserved, unless otherwise indicated.