Elsevier

Surface Science

Volume 305, Issues 1–3, 20 March 1994, Pages 317-321
Surface Science

Wave function modification via controlled potential perturbation

https://doi.org/10.1016/0039-6028(94)90908-3Get rights and content

Abstract

Parabolic quantum wells with a potential spike consisting of a small number (1,2,4) of AlAs-monolayers in the center of the well are investigated by means of low-temperature magnetotransport experiments. Intersubband scattering leads to a pronounced feature in the mobility versus carrier density characteristics when the second subband becomes populated. The strength of this feature decreases with increasing width of the AlAs spike which leads to conclusions on the overlap of the wave functions. In a magnetic field 1/B periodic oscillations of the resistance arise that cannot directly be related to the carrier density of one specific subband.

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