Weak Localization in Graphene: Theory, Simulations, and Experiments

We provide a comprehensive picture of magnetotransport in graphene monolayers in the limit of nonquantizing magnetic fields. We discuss the effects of two-carrier transport, weak localization, weak antilocalization, and strong localization for graphene devices of various mobilities, through theory,...

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Bibliographic Details
Published in:TheScientificWorld 2014-01, Vol.2014 (2014), p.1-8
Main Authors: Yu, Victor, Whiteway, Eric, Massicotte, Mathieu, Hilke, Michael
Format: Article
Language:English
Subjects:
Bands
Graphene
Graphite - chemistry
Magnetic Fields
Magnetic properties
Models, Theoretical
Observations
Semiconductors
Theory
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Summary:We provide a comprehensive picture of magnetotransport in graphene monolayers in the limit of nonquantizing magnetic fields. We discuss the effects of two-carrier transport, weak localization, weak antilocalization, and strong localization for graphene devices of various mobilities, through theory, experiments, and numerical simulations. In particular, we observe a minimum in the weak localization and strong localization length reminiscent of the minimum in the conductivity, which allows us to make the connection between weak and strong localization. This provides a unified framework for both localizations, which explains the observed experimental features. We compare these results to numerical simulation and find a remarkable agreement between theory, experiment, and numerics. Various graphene devices were used in this study, including graphene on different substrates, such as glass and silicon, as well as low and high mobility devices.
ISSN:2356-6140
1537-744X
1537-744X
DOI:10.1155/2014/737296