Probing Landau quantisation with the presence of insulator-quantum Hall transition in a GaAs two-dimensional electron system

Abstract

Magneto-transport measurements are performed on the two-dimensional electron system (2DES) in an AlGaAs/GaAs heterostructure. By increasing the magnetic field perpendicular to the 2DES, magnetoresistivity oscillations due to Landau quantisation can be identified just near the direct insulator-quantum Hall (I-QH) transition. However, different mobilities are obtained from the oscillations and transition point. Our study shows that the direct I-QH transition does not always correspond to the onset of strong localisation.

arXiv comment11 pages, 7 figures

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Cited by in corpus (3)

• Experimental evidence for direct insulator-quantum Hall transition in multi-layer graphene
• 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