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Graphene ballistic nano-rectifier with very high responsivity

Author

Listed:
  • Gregory Auton

    (School of Electrical and Electronic Engineering, University of Manchester
    Manchester Centre for Mesoscience and Nanotechnology, University of Manchester)

  • Jiawei Zhang

    (School of Electrical and Electronic Engineering, University of Manchester)

  • Roshan Krishna Kumar

    (School of Physics and Astronomy, University of Manchester)

  • Hanbin Wang

    (School of Physics and Center of Nanoelectronics, Shandong University)

  • Xijian Zhang

    (School of Physics and Center of Nanoelectronics, Shandong University)

  • Qingpu Wang

    (School of Physics and Center of Nanoelectronics, Shandong University)

  • Ernie Hill

    (Manchester Centre for Mesoscience and Nanotechnology, University of Manchester)

  • Aimin Song

    (School of Electrical and Electronic Engineering, University of Manchester
    School of Physics and Center of Nanoelectronics, Shandong University)

Abstract

Although graphene has the longest mean free path of carriers of any known electronic material, very few novel devices have been reported to harness this extraordinary property. Here we demonstrate a ballistic nano-rectifier fabricated by creating an asymmetric cross-junction in single-layer graphene sandwiched between boron nitride flakes. A mobility ∼200,000 cm2 V−1 s−1 is achieved at room temperature, well beyond that required for ballistic transport. This enables a voltage responsivity as high as 23,000 mV mW−1 with a low-frequency input signal. Taking advantage of the output channels being orthogonal to the input terminals, the noise is found to be not strongly influenced by the input. Hence, the corresponding noise-equivalent power is as low as 0.64 pW Hz−1/2. Such performance is even comparable to superconducting bolometers, which however need to operate at cryogenic temperatures. Furthermore, output oscillations are observed at low temperatures, the period of which agrees with the lateral size quantization.

Suggested Citation

  • Gregory Auton & Jiawei Zhang & Roshan Krishna Kumar & Hanbin Wang & Xijian Zhang & Qingpu Wang & Ernie Hill & Aimin Song, 2016. "Graphene ballistic nano-rectifier with very high responsivity," Nature Communications, Nature, vol. 7(1), pages 1-6, September.
    • Handle: RePEc:nat:natcom:v:7:y:2016:i:1:d:10.1038_ncomms11670
    DOI: 10.1038/ncomms11670
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