Ballistic transport in graphene grown by chemical vapor deposition

In this letter, we report the observation of ballistic transport on micron length scales in graphene synthesised by chemical vapour deposition (CVD). Transport measurements were done on Hall bar geometries in a liquid He cryostat. Using non-local measurements, we show that electrons can be ballistic...

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Bibliographic Details
Published in:Applied physics letters 2014-01, Vol.104 (2)
Main Authors: Calado, V. E., Zhu, Shou-En, Goswami, S., Xu, Q., Watanabe, K., Taniguchi, T., Janssen, G. C. A. M., Vandersypen, L. M. K.
Format: Article
Language:English
Subjects:
Applied physics
ATOMIC FORCE MICROSCOPY
Chemical synthesis
CHEMICAL VAPOR DEPOSITION
Correlation analysis
CRYOSTATS
ELECTRONS
GRAPHENE
MAGNETIC FIELDS
MATERIALS SCIENCE
Organic chemistry
TRANSPORT
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Summary:In this letter, we report the observation of ballistic transport on micron length scales in graphene synthesised by chemical vapour deposition (CVD). Transport measurements were done on Hall bar geometries in a liquid He cryostat. Using non-local measurements, we show that electrons can be ballistically directed by a magnetic field (transverse magnetic focussing) over length scales of ∼1 μm. Comparison with atomic force microscope measurements suggests a correlation between the absence of wrinkles and the presence of ballistic transport in CVD graphene.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.4861627