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Ferroelectrically driven spatial carrier density modulation in graphene

Author

Listed:
  • Christoph Baeumer

    (University of Illinois)

  • Diomedes Saldana-Greco

    (The Makineni Theoretical Laboratories, University of Pennsylvania)

  • John Mark P. Martirez

    (The Makineni Theoretical Laboratories, University of Pennsylvania)

  • Andrew M. Rappe

    (The Makineni Theoretical Laboratories, University of Pennsylvania)

  • Moonsub Shim

    (University of Illinois)

  • Lane W. Martin

    (University of Illinois
    University of California
    Lawrence Berkeley National Laboratory)

Abstract

The next technological leap forward will be enabled by new materials and inventive means of manipulating them. Among the array of candidate materials, graphene has garnered much attention; however, due to the absence of a semiconducting gap, the realization of graphene-based devices often requires complex processing and design. Spatially controlled local potentials, for example, achieved through lithographically defined split-gate configurations, present a possible route to take advantage of this exciting two-dimensional material. Here we demonstrate carrier density modulation in graphene through coupling to an adjacent ferroelectric polarization to create spatially defined potential steps at 180°-domain walls rather than fabrication of local gate electrodes. Periodic arrays of p–i junctions are demonstrated in air (gate tunable to p–n junctions) and density functional theory reveals that the origin of the potential steps is a complex interplay between polarization, chemistry, and defect structures in the graphene/ferroelectric couple.

Suggested Citation

  • Christoph Baeumer & Diomedes Saldana-Greco & John Mark P. Martirez & Andrew M. Rappe & Moonsub Shim & Lane W. Martin, 2015. "Ferroelectrically driven spatial carrier density modulation in graphene," Nature Communications, Nature, vol. 6(1), pages 1-9, May.
    • Handle: RePEc:nat:natcom:v:6:y:2015:i:1:d:10.1038_ncomms7136
    DOI: 10.1038/ncomms7136
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    Cited by:

    1. Shuai Zhang & Yang Liu & Zhiyuan Sun & Xinzhong Chen & Baichang Li & S. L. Moore & Song Liu & Zhiying Wang & S. E. Rossi & Ran Jing & Jordan Fonseca & Birui Yang & Yinming Shao & Chun-Ying Huang & Tak, 2023. "Visualizing moiré ferroelectricity via plasmons and nano-photocurrent in graphene/twisted-WSe2 structures," Nature Communications, Nature, vol. 14(1), pages 1-8, December.

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