Hot carrier diffusion in graphene

被引：91
作者：
Ruzicka, Brian A. [1 ]
Wang, Shuai [2 ]
Werake, Lalani K. [1 ]
Weintrub, Ben [1 ]
Loh, Kian Ping [2 ]
Zhao, Hui [1 ]
机构：
[1] Univ Kansas, Dept Phys & Astron, Lawrence, KS 66045 USA
[2] Natl Univ Singapore, Dept Chem, Singapore 117543, Singapore
来源：
PHYSICAL REVIEW B | 2010年 / 82卷 / 19期
基金：
美国国家科学基金会;
关键词：
PHOTOEXCITED CARRIERS; EPITAXIAL GRAPHENE; HIGH-MOBILITY; BERRYS PHASE; TRANSPORT; SPECTROSCOPY; CONFINEMENT; DYNAMICS;
D O I：
10.1103/PhysRevB.82.195414
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
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 11 000 and 5500 cm(2) 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.
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页数：5
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共 47 条
  • [1] Direct experimental observation of different diffusive transport regimes in semiconductor nanostructures
    Achermann, M
    Nechay, BA
    Morier-Genoud, F
    Schertel, A
    Siegner, U
    Keller, U
    [J]. PHYSICAL REVIEW B, 1999, 60 (03): : 2101 - 2105
  • [2] Superior thermal conductivity of single-layer graphene
    Balandin, Alexander A.
    Ghosh, Suchismita
    Bao, Wenzhong
    Calizo, Irene
    Teweldebrhan, Desalegne
    Miao, Feng
    Lau, Chun Ning
    [J]. NANO LETTERS, 2008, 8 (03) : 902 - 907
  • [3] Electronic confinement and coherence in patterned epitaxial graphene
    Berger, Claire
    Song, Zhimin
    Li, Xuebin
    Wu, Xiaosong
    Brown, Nate
    Naud, Cecile
    Mayou, Didier
    Li, Tianbo
    Hass, Joanna
    Marchenkov, Atexei N.
    Conrad, Edward H.
    First, Phillip N.
    de Heer, Wait A.
    [J]. SCIENCE, 2006, 312 (5777) : 1191 - 1196
  • [4] Electromechanical resonators from graphene sheets
    Bunch, J. Scott
    van der Zande, Arend M.
    Verbridge, Scott S.
    Frank, Ian W.
    Tanenbaum, David M.
    Parpia, Jeevak M.
    Craighead, Harold G.
    McEuen, Paul L.
    [J]. SCIENCE, 2007, 315 (5811) : 490 - 493
  • [5] Nanoparticle dispersion on reconstructed carbon nanomeshes
    Chen, W
    Loh, KP
    Xu, H
    Wee, ATS
    [J]. LANGMUIR, 2004, 20 (25) : 10779 - 10784
  • [6] Broadband electromagnetic response and ultrafast dynamics of few-layer epitaxial graphene
    Choi, H.
    Borondics, F.
    Siegel, D. A.
    Zhou, S. Y.
    Martin, M. C.
    Lanzara, A.
    Kaindl, R. A.
    [J]. APPLIED PHYSICS LETTERS, 2009, 94 (17)
  • [7] Measurement of ultrafast carrier dynamics in epitaxial graphene
    Dawlaty, Jahan M.
    Shivaraman, Shriram
    Chandrashekhar, Mvs
    Rana, Farhan
    Spencer, Michael G.
    [J]. APPLIED PHYSICS LETTERS, 2008, 92 (04)
  • [8] Large-area ultrathin films of reduced graphene oxide as a transparent and flexible electronic material
    Eda, Goki
    Fanchini, Giovanni
    Chhowalla, Manish
    [J]. NATURE NANOTECHNOLOGY, 2008, 3 (05) : 270 - 274
  • [9] Emtsev KV, 2009, NAT MATER, V8, P203, DOI [10.1038/nmat2382, 10.1038/NMAT2382]
  • [10] Ultrafast Optical-Pump Terahertz-Probe Spectroscopy of the Carrier Relaxation and Recombination Dynamics in Epitaxial Graphene
    George, Paul A.
    Strait, Jared
    Dawlaty, Jahan
    Shivaraman, Shriram
    Chandrashekhar, Mvs
    Rana, Farhan
    Spencer, Michael G.
    [J]. NANO LETTERS, 2008, 8 (12) : 4248 - 4251
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