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

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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