Transport Properties of CVD Graphene Cooled with a Biased Gate Voltage

ORAL

Abstract

Electron and hole transport in graphene continues to be a topic of theoretical and experimental interest[1-2]. In this experimental work, we examine electron/hole transport in a graphene Hall bar device, where the graphene was prepared using standard chemical vapor deposition on copper foils. This study aims to find the effect of cooling a graphene specimen under a gate bias on the transport characteristics. Thus, we present results from the measurements carried out in a closed cycle refrigerator out over a broad temperature range (295K – 15K), with a focus on the effect of the gate bias voltage on the charge neutrality point. Further we study the behavior of the Hall effect under different gate voltages around the charge neutrality point.

[1]. Y.-W. Tan, Y. Zhang, H.L. Stormer, and P.Kim, Eur. Phys. J. Special Topics 148 15-18 (2007)
[2]. R.G. Mani, Appl. Phys. Lett. 108, 033507 (2016)

*This work was supported by U.S. Department of Energy, Grant No. DE-SC0001762, Army Research Office under W911NF-14-2-0076 and W911NF-15-1-0433.

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Presenters

  • U. Kushan Wijewardena

    • Physics & Astronomy , Georgia State University
    • Physics & Astronomy, Georgia State University
    • Physics and Astronomy , Georgia State University
    • Physics and Astronomy, Georgia State University, 25 Park Place, #605, Georgia State University

Authors

  • U. Kushan Wijewardena

    • Physics & Astronomy , Georgia State University
    • Physics & Astronomy, Georgia State University
    • Physics and Astronomy , Georgia State University
    • Physics and Astronomy, Georgia State University, 25 Park Place, #605, Georgia State University

  • Rasanga Samaraweera

    • Physics & Astronomy , Georgia State University
    • Physics & Astronomy, Georgia State University
    • Georgia State Univ
    • Department of Physics, Georgia State University

  • Annika Kriisa

    • Physics & Astronomy , Georgia State University
    • Physics & Astronomy, Georgia State University
    • Georgia State Univ
    • Physics and Astronomy , Georgia State University
    • Department of Physics, Georgia State University
    • Physics and Astronomy, Georgia State University, 25 Park Place, #605, Georgia State University
    • Dept. of Physics and Astronomy, Georgia State Univ

  • Binuka Gunawardana

    • Physics & Astronomy , Georgia State University
    • Georgia State Univ
    • Physics and Astronomy , Georgia State University
    • Department of Physics, Georgia State University
    • Physics and Astronomy, Georgia State University, 25 Park Place, #605, Georgia State University

  • Tharanga Nanayakkara

    • Physics & Astronomy , Georgia State University
    • Physics & Astronomy, Georgia State University
    • Georgia State Univ
    • Physics and Astronomy , Georgia State University
    • Department of Physics, Georgia State University

  • C. Rasadi Munasinghe

    • Physics & Astronomy , Georgia State University
    • Georgia State Univ
    • Department of Physics, Georgia State University

  • Ramesh Mani

    • Physics & Astronomy , Georgia State University
    • Physics & Astronomy, Georgia State University
    • Georgia State Univ
    • Physics and Astronomy , Georgia State University
    • Department of Physics, Georgia State University
    • Physics and Astronomy, Georgia State University, 25 Park Place, #605, Georgia State University
    • Dept. of Physics and Astronomy, Georgia State Univ
    • Georgia State University