Abstract
Graphene, which is a planar single sheet of sp2-bonded carbon atoms arranged in honeycomb lattice with superior electrical and heat conducting properties, has been proposed as material for future electronic circuits, sensors and detectors. Practical applications of graphene devices require an acceptable level of the low-frequency 1/f γ electronic noise (f is frequency). We fabricated and investigated electronic noise characteristics in a set of back-gated and top-gated graphene field-effect transistors, which used single-layer and bi-layer graphene as the electrically conducting channel, and SiO2 and HfO2 as gate dielectrics. The Hooge parameter α H , which characterizes the noise level, for the single and bi-layer graphene devices is on the order of α H ∼ 10−4–10−3, which is comparable to that in the state-of-the-art devices made of conventional semiconductors. The generation – recombination (G-R) – type bulges in the noise spectra of some graphene devices suggest that the noise is of the carrier-number fluctuation origin and is caused by the charge carrier trapping and de-trapping by defects in graphene and SiO2 layer. The obtained experimental results are important for electronic and sensor applications of graphene.
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Acknowledgments
The work at UCR was supported, in part, by DARPA – SRC Focus Center Research Program (FCRP) through its Center on Functional Engineered Nano Architectonics (FENA) and Interconnect Focus Center (IFC), and by AFOSR award A9550-08-1-0100 on the Electron and Phonon Engineered Nano and Heterostructures. The work at RPI was supported by the National Science Foundation under I/UCRC “Connection One” and by IFC.
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Liu, G., Shao, Q., Balandin, A.A., Stillman, W., Shur, M., Rumyantsev, S. (2010). Low-Frequency Electronic Noise in the Back-Gated and Top-Gated Graphene Devices. In: Gusev, E., Garfunkel, E., Dideikin, A. (eds) Advanced Materials and Technologies for Micro/Nano-Devices, Sensors and Actuators. NATO Science for Peace and Security Series B: Physics and Biophysics. Springer, Dordrecht. https://doi.org/10.1007/978-90-481-3807-4_16
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DOI: https://doi.org/10.1007/978-90-481-3807-4_16
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