Details
| Original language | English |
|---|---|
| Article number | 075418 |
| Journal | Physical Review B - Condensed Matter and Materials Physics |
| Volume | 88 |
| Issue number | 7 |
| Publication status | Published - 14 Aug 2013 |
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.
ASJC Scopus subject areas
- Materials Science(all)
- Electronic, Optical and Magnetic Materials
- Physics and Astronomy(all)
- Condensed Matter Physics
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In: Physical Review B - Condensed Matter and Materials Physics, Vol. 88, No. 7, 075418, 14.08.2013.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Mixing of edge states at a bipolar graphene junction
AU - Schmidt, H.
AU - Rode, J. C.
AU - Belke, C.
AU - Smirnov, D.
AU - Haug, R. J.
PY - 2013/8/14
Y1 - 2013/8/14
N2 - 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.
AB - 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.
UR - http://www.scopus.com/inward/record.url?scp=84884377017&partnerID=8YFLogxK
U2 - 10.1103/PhysRevB.88.075418
DO - 10.1103/PhysRevB.88.075418
M3 - Article
AN - SCOPUS:84884377017
VL - 88
JO - Physical Review B - Condensed Matter and Materials Physics
JF - Physical Review B - Condensed Matter and Materials Physics
SN - 1098-0121
IS - 7
M1 - 075418
ER -