Magnetotransport in a wide parabolic quantum well

M. Shayegan, T. Sajoto, J. Jo, M. Santos, L. Engel

Research output: Contribution to journalArticle

7 Scopus citations

Abstract

Measurements of the magnetoresistance of a high-quality electron system realized in a selectively doped, parabolic AlxGa1-xAs well are reported. Quantum oscillations in the magnetoresistance are analyzed to obtain the electron densities of the electric subbands. These densities are in agreement with the predictions of a self-consistent calculation of the subband structure for this system. With the magnetic field B slightly tilted away from the sample plane, we observe a dramatic manifestation of the subband-Landau-level coupling. At low B, the magnetic depopulation of the hybrid (electric-magnetic) subbands occurs, while at higher fields, Shubnikov-de Haas-like oscillations (periodic in 1 B) are observed as the Fermi level crosses the quantized energy levels associated with the lowest hybrid subband.

Original languageEnglish (US)
Pages (from-to)83-87
Number of pages5
JournalSurface Science
Volume229
Issue number1-3
DOIs
StatePublished - Apr 2 1990

All Science Journal Classification (ASJC) codes

  • Condensed Matter Physics
  • Surfaces and Interfaces
  • Surfaces, Coatings and Films
  • Materials Chemistry

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