Intrinsic and Extrinsic performance limits of graphene device on SiO$_{2}$

ORAL

Abstract

We have measured the temperature-dependent resistivity of clean graphene devices on SiO$_{2}$ from 16K to 485K in ultra high vacuum[1]. Longitudinal acoustic phonons, intrinsic to graphene, give rise to the measured resistivity linearly dependent on temperature from 16 to $\sim $200K. Above 200 K, a sharp upturn in resistivity is observed due to remote interfacial phonon (RIP) scattering by the polar optical phonons of the SiO$_{2}$ substrate. Combining the contributions from intrinsic and extrinsic phonons, we are able to explain the complete temperature and carrier density dependence of the graphene resistivity on SiO$_{2}$. For a technologically relevant carrier density of n = 10$^{12}$ cm$^{-2}$ at room temperature, the intrinsic phonon scattering will only limit the mobility to $\sim $2x10$^{5}$ cm$^{2}$/Vs, while the extrinsic RIP scattering from SiO$_{2}$ will limit the mobility to $\sim $4x10$^{4}$cm$^{2}$/Vs. [1] J. H. Chen, et al., http://arxiv.org/abs/0711.3646

*Supported by the U.S. Office of Naval Research grant no. N000140610882 (CJ,SX,MSF), NSF grant no. CCF-06-34321 (MSF), NSF-UMD-MRSEC grant no. DMR 05-20471 (JHC), and the IC Postdoctoral Research Fellowship Program (MI).

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Authors

  • Jianhao Chen

    • Dept. of Physics, University of Maryland, College Park, MD
    • University of Maryland
    • Department of Physics and Center for Nanophysics and Advanced Materials, University of Maryland, College Park, MD 20742

  • Chaun Jang

    • Department of Physics and Center for Nanophysics and Advanced Materials, University of Maryland, College Park, MD 20742

  • Shudong Xiao

    • Department of Physics and Center for Nanophysics and Advanced Materials, University of Maryland, College Park, MD 20742

  • Masa Ishigami

    • Department of Physics and Materials Research Science and Engineering Center, University of Maryland, College Park, MD 20742

  • Michael Fuhrer

    • University of Maryland
    • Dept. of Physics, University of Maryland, College Park, MD
    • Dept. of Physics, University of Mayland, College Park,MD 20742-4111 USA
    • Mater. Res. Sci. and Eng. Ctr., Ctr. for Nanophys. and Adv. Mater., and Dept. of Phys., Univ. of MD, College Park, MD 20742
    • Department of Physics and Center for Nanophysics and Advanced Materials, University of Maryland
    • Department of Physics and Center for Nanophysics and Advanced Materials, University of Maryland, College Park, MD 20742