Minke, S. and Jhang, S. H. and Wurm, J. and Skourski, Y. and Wosnitza, J. and Strunk, C. and Weiss, D. and Richter, K. and Eroms, J. (2012) Magnetotransport through graphene nanoribbons at high magnetic fields. PHYSICAL REVIEW B, 85 (19): 195432. ISSN 1098-0121,
Full text not available from this repository. (Request a copy)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 densities we 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 and bulk short-range impurities are important in our samples.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | ; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics Physics > Institute of Theroretical Physics > Chair Professor Richter > Group Klaus Richter Physics > Institute of Experimental and Applied Physics Physics > Institute of Experimental and Applied Physics > Chair Professor Weiss > Group Christoph Strunk |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 14 May 2020 05:05 |
| Last Modified: | 14 May 2020 05:05 |
| URI: | https://pred.uni-regensburg.de/id/eprint/18740 |
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