Composite Fermions with Tunable Fermi Contour Anisotropy

D. Kamburov, Yang Liu, M. Shayegan, L. N. Pfeiffer, K. W. West, K. W. Baldwin

Research output: Contribution to journalArticlepeer-review

47 Scopus citations


The composite fermion formalism elegantly describes some of the most fascinating behaviors of interacting two-dimensional carriers at low temperatures and in strong perpendicular magnetic fields. In this framework, carriers minimize their energy by attaching two flux quanta and forming new quasiparticles, the so-called composite fermions. Thanks to the flux attachment, when a Landau level is half-filled, the composite fermions feel a vanishing effective magnetic field and possess a Fermi surface with a well-defined Fermi contour. Our measurements in a high-quality two-dimensional hole system confined to a GaAs quantum well demonstrate that a parallel magnetic field can significantly distort the hole-flux composite fermion Fermi contour.

Original languageEnglish (US)
Article number206801
JournalPhysical review letters
Issue number20
StatePublished - May 13 2013

All Science Journal Classification (ASJC) codes

  • General Physics and Astronomy


Dive into the research topics of 'Composite Fermions with Tunable Fermi Contour Anisotropy'. Together they form a unique fingerprint.

Cite this