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.

*The authors gratefully acknowledge funding support through the SC EPSCoR/IDeA Program under Award #18-SR03, and the NASA EPSCoR Program under Award #NNH17ZHA002C.

–

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