Robust mesoscopic fluctuations in disordered graphene

G. Bohra; R. Somphonsane; N. Aoki; Y. Ochiai; D. K. Ferry; J. P. Bird

doi:10.1063/1.4748167

Robust mesoscopic fluctuations in disordered graphene

G. Bohra, R. Somphonsane, N. Aoki, Y. Ochiai, D. K. Ferry, J. P. Bird

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

The temperature dependence of the mesoscopic conductance fluctuations is investigated for disordered graphene. The fluctuations are generated by varying either magnetic field or carrier density (via a back-gate). Very different temperature cut-offs are found for these two types of fluctuations, with the density-induced features persisting to much higher temperatures (beyond 100 K, even) than those observed when sweeping magnetic field. The robust character of the density-dependent fluctuations may cause them to play an important role in determining the operation of future graphene nanodevices, particularly as device sizes are reduced to the nanoscale.

Original language	English (US)
Article number	093110
Journal	Applied Physics Letters
Volume	101
Issue number	9
DOIs	https://doi.org/10.1063/1.4748167
State	Published - Aug 27 2012

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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10.1063/1.4748167

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abstract = "The temperature dependence of the mesoscopic conductance fluctuations is investigated for disordered graphene. The fluctuations are generated by varying either magnetic field or carrier density (via a back-gate). Very different temperature cut-offs are found for these two types of fluctuations, with the density-induced features persisting to much higher temperatures (beyond 100 K, even) than those observed when sweeping magnetic field. The robust character of the density-dependent fluctuations may cause them to play an important role in determining the operation of future graphene nanodevices, particularly as device sizes are reduced to the nanoscale.",

author = "G. Bohra and R. Somphonsane and N. Aoki and Y. Ochiai and Ferry, {D. K.} and Bird, {J. P.}",

note = "Funding Information: This research was supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award DE-FG03-01ER45920 (G.B. and J.P.B.), and by the National Science Foundation under Award OISE0968405 (R.S.). We also gratefully acknowledge the assistance of J. M. Velazquez and B. J. Schultz with the micro-Raman measurements. ",

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AU - Ferry, D. K.

AU - Bird, J. P.

N1 - Funding Information: This research was supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award DE-FG03-01ER45920 (G.B. and J.P.B.), and by the National Science Foundation under Award OISE0968405 (R.S.). We also gratefully acknowledge the assistance of J. M. Velazquez and B. J. Schultz with the micro-Raman measurements.

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Y1 - 2012/8/27

N2 - The temperature dependence of the mesoscopic conductance fluctuations is investigated for disordered graphene. The fluctuations are generated by varying either magnetic field or carrier density (via a back-gate). Very different temperature cut-offs are found for these two types of fluctuations, with the density-induced features persisting to much higher temperatures (beyond 100 K, even) than those observed when sweeping magnetic field. The robust character of the density-dependent fluctuations may cause them to play an important role in determining the operation of future graphene nanodevices, particularly as device sizes are reduced to the nanoscale.

AB - The temperature dependence of the mesoscopic conductance fluctuations is investigated for disordered graphene. The fluctuations are generated by varying either magnetic field or carrier density (via a back-gate). Very different temperature cut-offs are found for these two types of fluctuations, with the density-induced features persisting to much higher temperatures (beyond 100 K, even) than those observed when sweeping magnetic field. The robust character of the density-dependent fluctuations may cause them to play an important role in determining the operation of future graphene nanodevices, particularly as device sizes are reduced to the nanoscale.

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Robust mesoscopic fluctuations in disordered graphene

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