Nonlinear transport in 2D electron gas exhibiting colossal negative magnetoresistance
arXiv:1410.6116 · doi:10.1103/PhysRevB.90.201301
Abstract
We report on nonlinear transport measurements in a GaAs/AlGaAs quantum well exhibiting a colossal negative magnetoresistance effect. Under applied dc bias, the magnetoresistance becomes nonmonotonic, exhibiting distinct extrema that move to higher magnetic fields with increasing current. In the range of magnetic fields corresponding to the resistivity minimum at zero bias, the resistivity increases linearly with current and the rate of this increase scales with the inverse magnetic field. The latter observation is consistent with the theory, proposed more than 35 years ago, considering classical memory effects in the presence of strong, dilute scatterers.
~4 pages, 5 figures
References in corpus (6)
- Magnetotransport in a two-dimensional electron system in dc electric fields
- Non-linear Resistivity of a Two-Dimensional Electron Gas in a Magnetic Field
- Colossal negative magnetoresistance in a 2D electron gas
- Giant microwave photoresistivity in a high-mobility quantum Hall system
- Role of electron-electron interactions in nonlinear transport in 2D electron systems
- Zero differential resistance in two-dimensional electron systems at large filling factors