Nonlinear response of a MgZnO/ZnO heterostructure close to zero bias
arXiv:1708.09841 · doi:10.1103/PhysRevB.96.125401
Abstract
We report on magnetotransport properties of a MgZnO/ZnO heterostructure subjected to weak direct currents. We find that in the regime of overlapping Landau levels, the differential resistivity acquires a quantum correction proportional to both the square of the current and the Dingle factor. The analysis shows that the correction to the differential resistivity is dominated by a current-induced modification of the electron distribution function and allows us to access both quantum and inelastic scattering rates.
arXiv comment4 pages, 3 figures
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