Mixing of edge states at a bipolar graphene junction

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Schmidt, H.; Rode, J.C.; Belke, C.; Smirnov, D.; Haug, R.J.: Mixing of edge states at a bipolar graphene junction. In: Physical Review B 88 (2013), Nr. 7, 75418. DOI: https://doi.org/10.1103/PhysRevB.88.075418

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Sum total of downloads: 85




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Abstract: 
An atomic force microscope is used to locally manipulate a single layer graphene sheet. Transport measurements in this region as well as in the unmanipulated part reveal different charge carrier densities, while mobilities stay in the order of 104 cm2(Vs)-1. With a global backgate, the system is tuned from a unipolar n-n′ or p-p′ junction with different densities to a bipolar p-n junction. Magnetotransport across this junction verifies its nature, showing the expected quantized resistance values as well as the switching with the polarity of the magnetic field. Measurements at higher magnetic fields show a suppression of the mixing of edge states with different polarity at the p-n junction. © 2013 American Physical Society.
License of this version: Es gilt deutsches Urheberrecht. Das Dokument darf zum eigenen Gebrauch kostenfrei genutzt, aber nicht im Internet bereitgestellt oder an Außenstehende weitergegeben werden.
Document Type: Article
Publishing status: publishedVersion
Issue Date: 2013
Appears in Collections:Fakultät für Mathematik und Physik

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pos. country downloads
total perc.
1 image of flag of Germany Germany 48 56.47%
2 image of flag of United States United States 19 22.35%
3 image of flag of China China 9 10.59%
4 image of flag of Netherlands Netherlands 2 2.35%
5 image of flag of Ireland Ireland 2 2.35%
6 image of flag of United Kingdom United Kingdom 2 2.35%
7 image of flag of Taiwan Taiwan 1 1.18%
8 image of flag of Italy Italy 1 1.18%
9 image of flag of Belgium Belgium 1 1.18%

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