AI Article Synopsis
- Heterostructures featuring high-mobility two-dimensional electron gas were formed into freestanding helical Hall bars for testing.
- Magnetotransport measurements showed significant results, such as minima in the longitudinal magnetoresistance linked to both integer and fractional filling factors under high magnetic fields.
- An observed asymmetry in magnetoresistance depending on magnetic field direction led to an analysis using an edge state model and Landauer-Büttiker calculations.
Article Abstract
Heterostructures containing high-mobility two-dimensional electron gas were rolled into freestanding helically shaped contacted Hall bars. Magnetotransport measurements in these structures at high magnetic fields revealed minima in the longitudinal magnetoresistance corresponding to integer and fractional filling factors. A strong asymmetry of the longitudinal magnetoresistance with respect to the external magnetic field direction was observed. For this new type of structures, an edge state picture was considered, and calculations based on the Landauer-Büttiker formalism are performed.
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