From semiclassical transport to quantum Hall effect under low-field Landau quantization
arXiv:cond-mat/0608408 · doi:10.1016/j.ssc.2006.09.044
Abstract
The crossover from the semiclassical transport to quantum Hall effect is studied by examining a two-dimensional electron system in an AlGaAs/GaAs heterostructure. By probing the magneto-oscillations, it is shown that the semiclassical Shubnikov-de Haas (SdH) formulation can be valid even when the minima of the longitudinal resistivity approach zero. The extension of the applicable range of the SdH theory could be due to the damping effects resulting from disorder and temperature. Moreover, we observed plateau-plateau transition like behavior with such an extension. From our study, it is important to include the positive magnetoresistance to refine the SdH theory.
11 pages, 5 figures
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Cited by in corpus (7)
- Evidence for effective mass reduction in GaAs/AlGaAs quantum wells
- Probing semiclassical magneto-oscillations in the low-field quantum Hall effect
- From insulator to quantum Hall liquid at low magnetic fields
- Probing Landau quantisation with the presence of insulator-quantum Hall transition in a GaAs two-dimensional electron system
- Probing temperature-driven flow lines in a gated two-dimensional electron gas with tunable spin-splitting
- Probing onset of strong localization and electron-electron interactions with the presence of direct insulator-quantum Hall transition
- Insulator, semiclassical oscillations and quantum Hall liquids at low magnetic fields