Role of temperature dependent scattering mechanisms on the electronic transport in freestanding graphene foams

ORAL

Abstract

We present electronic transport properties of freestanding graphene foam (pristine and nitrogen-doped) using four-probe resistance (R) and Seebeck coefficient (S) measurements in the temperature range ~10-300 K. In pristine graphene, a low value of S ~2 μV/K at room temperature was measured which is attributed to the unique band structure of graphene (symmetric) and low density of states near the Dirac point. With nitrogen doping, the electron-hole symmetry was broken, leading to a six-fold enhancement of S. A theoretical study of temperature dependent scattering mechanisms contributing to the electronic transport characteristics was performed within the framework of Boltzmann transport theory under relaxation time approximation.

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Presenters

  • Prakash Parajuli

    Clemson Nanomaterials Institute, Department of Physics and Astronomy, Clemson University

Authors

  • Prakash Parajuli

    Clemson Nanomaterials Institute, Department of Physics and Astronomy, Clemson University

  • Chuanchang Zeng

    Department of Physics and Astronomy, Clemson University

  • Fengjiao Liu Case

    Clemson Nanomaterials Institute, Department of Physics and Astronomy, Clemson University, Clemson Nanomaterials Institute, Department of Physics & Astronomy, Clemson University, Clemson, 29634, SC, USA

  • Pooja Puneet

    Clemson Nanomaterials Institute, Department of Physics and Astronomy, Clemson University

  • Ramakrishna Podila

    Clemson Nanomaterials Institute, Department of Physics and Astronomy, Clemson University, Laboratory of Nano-Biophysics, Clemson University

  • Sumanta Tewari

    Department of Physics and Astronomy, Clemson University

  • Sriparna Bhattacharya

    Clemson Nanomaterials Institute, Department of Physics and Astronomy, Clemson University

  • Apparao M. Rao

    Clemson Nanomaterials Institute, Department of Physics and Astronomy, Clemson University, Clemson Nanomaterials Institute, Department of Physics and Astronomy, Clemson Univer, Clemson Nanomaterials Institute, Department of Physics & Astronomy, Clemson University, Clemson, 29634, SC, USA, Clemson Nanomaterials Institute, Department of Physics and Astronomy, Clemson University, South Carolina