Journal
NANO LETTERS
Volume 15, Issue 3, Pages 1673-1678Publisher
AMER CHEMICAL SOC
DOI: 10.1021/nl504305s
Keywords
helical nanomembranes; two-dimensional electron gas on cylindrical surface; electron transport; edge channels; fractional quantum Hall effect; magnetic field gradient
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Funding
- Russian Foundation for Basic Research [12-02-00918a]
- Siberian Branch of Russian Academy of Science [128]
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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-Buttiker formalism are performed.
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