Transport conductivity of graphene at RF and microwave frequencies
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Authors
Awan, SA
Lombardo, A
Colli, A
Privitera, G
Kulmala, TS
Kivioja, JM
Koshino, M
Ferrari, AC
Publication Date
2016Journal Title
2D Materials
ISSN
2053-1583
Publisher
IOP Publishing
Volume
3
Issue
1
Type
Article
Metadata
Show full item recordCitation
Awan, S., Lombardo, A., Colli, A., Privitera, G., Kulmala, T., Kivioja, J., Koshino, M., & et al. (2016). Transport conductivity of graphene at RF and microwave frequencies. 2D Materials, 3 (1) https://doi.org/10.1088/2053-1583/3/1/015010
Abstract
We measure graphene coplanar waveguides from direct current (DC) to 13.5GHz
and show that the apparent resistance (in the presence of parasitic impedances)
has an quadratic frequency dependence, but the intrinsic conductivity (without
the influence of parasitic impedances) is frequency-independent. Consequently,
in our devices the real part of the complex alternating current conductivity is
the same as the DC value and the imaginary part~0. The graphene channel is
modelled as a parallel resistive-capacitive network with a frequency dependence
identical to that of the Drude conductivity with momentum relaxation
time~2.1ps, highlighting the influence of alternating current (AC) electron
transport on the electromagnetic properties of graphene. This can lead to
optimized design of high-speed analogue field-effect transistors, mixers,
frequency doublers, low-noise amplifiers and radiation detectors.
Keywords
graphene, high frequency, electronics
Sponsorship
Engineering and Physical Sciences Research Council (EP/K01711X/1)
Engineering and Physical Sciences Research Council (EP/K017144/1)
European Commission (604391)
Identifiers
External DOI: https://doi.org/10.1088/2053-1583/3/1/015010
This record's URL: https://www.repository.cam.ac.uk/handle/1810/283421
Rights
Licence:
http://www.rioxx.net/licenses/all-rights-reserved
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