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Title: Hot carrier diffusion in graphene
Authors: Ruzicka, B.A.
Wang, S. 
Werake, L.K.
Weintrub, B.
Loh, K.P. 
Zhao, H.
Issue Date: 8-Nov-2010
Citation: Ruzicka, B.A., Wang, S., Werake, L.K., Weintrub, B., Loh, K.P., Zhao, H. (2010-11-08). Hot carrier diffusion in graphene. Physical Review B - Condensed Matter and Materials Physics 82 (19) : -. ScholarBank@NUS Repository.
Abstract: 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 pointlike excitation are monitored. Carrier-diffusion coefficients of 11000 and 5500 cm2 s⊃-1 are measured in epitaxial graphene and reduced graphene-oxide samples, respectively, with a carrier temperature on the order of 3600 K. The demonstrated optical techniques can be used for noncontact and noninvasive in situ detection of transport properties of graphene. © 2010 The American Physical Society.
Source Title: Physical Review B - Condensed Matter and Materials Physics
ISSN: 10980121
DOI: 10.1103/PhysRevB.82.195414
Appears in Collections:Staff Publications

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