Broadening processes in GaAs delta-doped quantum wire superlattices

Details Broadening processes in GaAs delta-doped quantum wire superlattices Broadening processes in GaAs delta-doped quantum wire superlattices

2007-08-13

arxiv.org/abs/0708.1674v1

Superlattices and Microstructures, 30, 4, p 215 (2001)

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

Scientific paper

10.1006/spmi.2001.1007

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 delta-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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