Ballistic transport in graphene grown by chemical vapor deposition

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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Veröffentlicht in:Applied physics letters 2014-01, Vol.104 (2)
Hauptverfasser: Calado, V. E., Zhu, Shou-En, Goswami, S., Xu, Q., Watanabe, K., Taniguchi, T., Janssen, G. C. A. M., Vandersypen, L. M. K.
Format: Artikel
Sprache:eng
Schlagworte:
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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Beschreibung
Zusammenfassung: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