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Broadening processes in GaAsδ-doped quantum wire superlattices

✍ Scribed by T. Ferrus; B. Goutiers; J. Galibert; F. Michelini

Publisher
Elsevier Science
Year
2001
Tongue
English
Weight
178 KB
Volume
30
Category
Article
ISSN
0749-6036

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✦ Synopsis

We use both Quantum Hall and Shubnikov de Haas experiments at high magnetic field and low temperature to analyse broadening processes of Landau levels in a δ-doped 2D quantum well superlattice and a 1D quantum wire superlattice generated from the first one by controlled dislocation slips. We deduce first the origin of the broadening from the damping factor in the Shubnikov de Haas curves in various configurations of the magnetic field and the measured current for both kinds of superlattice. Then, we write a general formula for the resistivity in the Quantum Hall effect introducing a dephasing factor we link to the process of localization.

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