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

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

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103 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 - 2002

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy(all)

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