Valley Splitting of AlAs Two-Dimensional Electrons in a Perpendicular Magnetic Field

Y. P. Shkolnikov, E. P. De Poortere, E. Tutuc, Mansour Shayegan

Research output: Contribution to journalArticle

94 Scopus citations

Abstract

By measuring the angles at which the Landau levels overlap in tilted magnetic fields (the coincidence method), we determine the splitting of the conduction-band valleys in high-mobility two-dimensional electrons confined to AlAs quantum wells. The data reveal that, while the valleys are nearly degenerate in the absence of magnetic field, they split as a function of perpendicular magnetic field. The splitting appears to depend primarily on the magnitude of the perpendicular component of the magnetic field, suggesting electron-electron interaction as its origin.

Original languageEnglish (US)
JournalPhysical Review Letters
Volume89
Issue number22
DOIs
StatePublished - Jan 1 2002

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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