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Low-Threshold Field Emission from Carbon Structures

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Abstract—

The surface of graphene-like structures placed in an electric field with a strength of 1−10 V/μm is found to undergo considerable deformation. This effect is observed in both a direct field (emission current is present) and a reverse field (emission current is absent). The deformation of the surface of cathodes facilitates low-threshold electron emission. The qualitative model proposed here to explain the effect of low-energy electron emission is based on the idea of surface reconstruction and the formation of centers with negative correlation energies (negative-U centers).

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ACKNOWLEDGMENTS

Raman spectroscopy measurements were conducted in the resource center “Geomodel” of the scientific park of St. Petersburg State University. Scanning electron microscopy was performed using the facilities of the Federal Center for Collective Use “Materials Science and Diagnostics in Advanced Technologies”.

Funding

The work was supported by the Ministry of Education and Science of the Russian Federation (project ID, RFMEFI62117X0018).

Author information

Authors and Affiliations

  1. Surface Physics and Electronics Research Center, Bonch-Bruevich Saint-Petersburg State University of Telecommunications, 193232, St. Petersburg, Russia

    G. N. Fursey, M. A. Polyakov & I. I. Zakirov

  2. Peter the Great St. Petersburg Polytechnic University, 195251, St. Petersburg, Russia

    N. T. Bagraev

  3. Ioffe Institute, 194021, St. Petersburg, Russia

    N. T. Bagraev & A. V. Nashchekin

  4. St. Petersburg State University, 199034, St. Petersburg, Russia

    V. N. Bocharov

Authors
  1. G. N. Fursey
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  2. M. A. Polyakov
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  3. N. T. Bagraev
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  4. I. I. Zakirov
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  5. A. V. Nashchekin
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  6. V. N. Bocharov
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Correspondence to G. N. Fursey.

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Translated by A. Kukharuk

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Fursey, G.N., Polyakov, M.A., Bagraev, N.T. et al. Low-Threshold Field Emission from Carbon Structures. J. Surf. Investig. 13, 814–824 (2019). https://doi.org/10.1134/S1027451019050057

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