Interaction mediated asymmetries of the quantized Hall effect

Abstract

Experimental and theoretical investigations on the integer quantized Hall effect in gate defined narrow Hall bars are presented. At low electron mobility the classical (high temperature) Hall resistance line RH(B) cuts through the center of all Hall plateaus. In contrast, for our high mobility samples the intersection point, at even filling factors ν= 2; 4 ..., is clearly shifted towards larger magnetic fields B. This asymmetry is in good agreement with predictions of the screening theory, i. e. taking Coulomb interaction into account. The observed effect is directly related to the formation of incompressible strips in the Hall bar. The spin-split plateau at ν= 1 is found to be almost symmetric regardless of the mobility. We explain this within the so-called effective g-model.

4 pages, 3 figures

References in corpus (5)

• Realistic modelling of quantum point contacts subject to high magnetic fields and with current bias at out of linear response regime
• Range-Dependent Disorder Effects on the Plateau-Widths Calculated within the Screening Theory of the Iqhe
• Spin gap in the 2D electron system of GaAs/AlGaAs single heterojunctions in weak magnetic fields
• Investigations on unconventional aspects in the quantum Hall regime of narrow gate defined channels
• The spin-split incompressible edge states within empirical Hartree approximation at intermediately large Hall samples

Cited by in corpus (8)

• Asymmetric non-linear response of the IQHE
• Interplay of fractional quantum Hall states and localization in quantum point contacts
• Evanescent incompressible strips as origin of the observed Hall resistance overshoot
• The visibility of IQHE at sharp edges: Experimental proposals based on interactions and edge electrostatics
• Transition from edge- to bulk-currents in the quantum Hall regime
• The current polarization rectification of the integer quantized Hall effect
• The Dip Effect under Integer Quantized Hall Conditions
• Nature of current flow in the regime of the quantum Hall effect