Hot carrier diffusion in graphene
Issue Date
2010-11Author
Ruzicka, Brian Andrew
Wang, Shuai
Werake, Lalani Kumari
Weintrub, Ben
Loh, Kian Ping
Zhao, Hui
Publisher
American Physical Society
Type
Other
Version
http://arxiv.org/abs/1005.3850v2
Metadata
Show full item recordAbstract
We report an optical study of charge transport in graphene. Diffusion of hot carriers in epitaxial graphene and reduced graphene oxide samples are studied using an ultrafast pump-probe technique with a high spatial resolution. Spatiotemporal dynamics of hot carriers after a point-like excitation are monitored. Carrier diffusion coefficients of 11,000 and 5,500 squared centimeters per second are measured in epitaxial graphene and reduced graphene oxide samples, respectively, with a carrier temperature on the order of 3,600 K. The demonstrated optical techniques can be used for non-contact and non-invasive in-situ detection of transport properties of graphene.
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Citation
B.A. Ruzicka, S. Wang, L.K. Werake, B. Weintrub, K.P. Loh, and Hui Zhao, Hot carrier diffusion in graphene, Physical Review B, 82, 195414 (2010). http://link.aps.org/doi/10.1103/PhysRevB.82.195414
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