Publikationsrepositorium - Helmholtz-Zentrum Dresden-Rossendorf
1 PublikationMagnetotransport through graphene nanoribbons at high magnetic fields
Minke, S.; Jhang, S. H.; Wurm, J.; Skourski, Y.; Wosnitza, J.; Strunk, C.; Weiss, D.; Richter, K.; Eroms, J.
Abstract
We have investigated the magnetoresistance of lithographically prepared single-layer graphene nanoribbons in pulsed, perpendicular magnetic fields up to 60 T and performed corresponding transport simulations using a tight-binding model and several types of disorder. In experiment, at high carrier densitieswe observe Shubnikov-de Haas oscillations and the quantum Hall effect, while at low densities the oscillations disappear and an initially negative magnetoresistance becomes strongly positive at high magnetic fields. The strong resistance increase at very high fields and low-carrier densities is tentatively ascribed to a field-induced insulating state in the bulk graphene leads. Comparing numerical results and experiment, we demonstrate that at least edge disorder andbulk short-range impurities are important in our samples.
Beteiligte Forschungsanlagen
- Hochfeld-Magnetlabor (HLD)
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Physical Review B 85(2012), 195432
DOI: 10.1103/PhysRevB.85.195432
Cited 14 times in Scopus
Permalink: https://www.hzdr.de/publications/Publ-17243