Nonlinear transport and oscillating magnetoresistance in double quantum wells

Details Nonlinear transport and oscillating magnetoresistance in double quantum wells Nonlinear transport and oscillating magnetoresistance in double quantum wells

2008-11-27

arxiv.org/abs/0811.4597v1

Physics

Condensed Matter

Mesoscale and Nanoscale Physics

20 pages, 10 figures

Scientific paper

We study the evolution of low-temperature magnetoresistance in double quantum wells in the region below 1 Tesla as the applied current density increases. A flip of the magneto-intersubband oscillation peaks, which occurs as a result of the current-induced inversion of the quantum component of resistivity, is observed. We also see splitting of these peaks as another manifestation of nonlinear behavior, specific for the two-subband electron systems. The experimental results are quantitatively explained by the theory based on the kinetic equation for the isotropic non-equilibrium part of electron distribution function. The inelastic scattering time is determined from the dependence of the inversion magnetic field on the current.

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