Journal
APPLIED PHYSICS LETTERS
Volume 107, Issue 25, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4938073
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Funding
- Swiss National Science Foundation
- Swiss Nanoscience Institute
- Swiss NCCR QSIT
- ERC Advanced Investigator Grant QUEST
- EU flagship project graphene
- Deutsche Forschungsgemeinschaft [SFB 689]
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We present a beam splitter in a suspended, ballistic, multiterminal, bilayer graphene device. By using local bottomgates, a p-n interface tilted with respect to the current direction can be formed. We show that the p-n interface acts as a semi-transparent mirror in the bipolar regime and that the reflectance and transmittance of the p-n interface can be tuned by the gate voltages. Moreover, by studying the conductance features appearing in magnetic field, we demonstrate that the position of the p-n interface can be moved by 1 mu m. The herein presented beamsplitter device can form the basis of electron-optic interferometers in graphene. (C) 2015 AIP Publishing LLC.
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