NMR Determination of 2D Electron Spin Polarization at ν=1/2

S. Melinte, N. Freytag, M. Horvatić, C. Berthier, L. P. Lévy, V. Bayot, and M. Shayegan
Phys. Rev. Lett. 84, 354 – Published 10 January 2000
PDFExport Citation

Abstract

Using a “standard” NMR spin-echo technique we determined the spin polarization P of two-dimensional electrons, confined to GaAs quantum wells, from the hyperfine shift of Ga nuclei located in the wells. Concentrating on the temperature ( 0.05T10K) and magnetic field ( 7B17T) dependencies of P at Landau level filling factor ν=1/2, we find that the results are described well by a simple model of noninteracting composite fermions, although some inconsistencies remain when the two-dimensional electron system is tilted in the magnetic field.

  • Received 6 August 1999

DOI:https://doi.org/10.1103/PhysRevLett.84.354

©2000 American Physical Society

Authors & Affiliations

S. Melinte1,*, N. Freytag2, M. Horvatić2, C. Berthier2,3, L. P. Lévy2,4, V. Bayot5, and M. Shayegan6

  • 1Unité PCPM, Université Catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium
  • 2Grenoble High Magnetic Field Laboratory, MPI-FKF and CNRS, BP 166, F-38042 Grenoble Cedex 9, France
  • 3Laboratoire de Spectrométrie Physique, Université J. Fourier, BP 87, F-38402 St. Martin d'Hères, France
  • 4Institut Universitaire de France et Université J. Fourier, BP 41, F-38402 St. Martin d'Hères, France
  • 5Unité DICE, Université Catholique de Louvain, B-1348 Louvain-la-Neuve, Belgium
  • 6Department of Electrical Engineering, Princeton University, Princeton, New Jersey 08544

  • *Electronic address: sorin@pcpm.ucl.ac.be

References (Subscription Required)

Click to Expand
Issue

Vol. 84, Iss. 2 — 10 January 2000

Reuse & Permissions
Access Options
Author publication services for translation and copyediting assistance advertisement

Authorization Required


×
×

Images

×

Sign up to receive regular email alerts from Physical Review Letters

Log In

Cancel
×

Search


Article Lookup

Paste a citation or DOI

Enter a citation
×