Valley splitting of AlAs two-dimensional electrons in a perpendicular magnetic field

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 (2D) 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.

arXiv commentRevtex4: 4 pages, 4 figures. Submitted for publication

References in corpus (1)

• Anomalous spin-splitting of two-dimensional electrons in an AlAs Quantum Well

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