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The mechanism of caesium intercalation of graphene

Author

Listed:
  • M. Petrović

    (Institut za fiziku, Bijenička 46)

  • I. Šrut Rakić

    (Institut za fiziku, Bijenička 46)

  • S. Runte

    (II. Physikalisches Institut, Universität zu Köln)

  • C. Busse

    (II. Physikalisches Institut, Universität zu Köln)

  • J. T. Sadowski

    (Center for Functional Nanomaterials, Brookhaven National Lab)

  • P. Lazić

    (Institut Ruđer Bošković, Bijenička 54)

  • I. Pletikosić

    (Institut za fiziku, Bijenička 46)

  • Z.-H. Pan

    (Brookhaven National Lab)

  • M. Milun

    (Institut za fiziku, Bijenička 46)

  • P. Pervan

    (Institut za fiziku, Bijenička 46)

  • N. Atodiresei

    (Peter Grünberg Institut & Institute for Advanced Simulation, Forschungszentrum Jülich and JARA)

  • R. Brako

    (Institut Ruđer Bošković, Bijenička 54)

  • D. Šokčević

    (Institut Ruđer Bošković, Bijenička 54)

  • T. Valla

    (Brookhaven National Lab)

  • T. Michely

    (II. Physikalisches Institut, Universität zu Köln)

  • M. Kralj

    (Institut za fiziku, Bijenička 46)

Abstract

Properties of many layered materials, including copper- and iron-based superconductors, topological insulators, graphite and epitaxial graphene, can be manipulated by the inclusion of different atomic and molecular species between the layers via a process known as intercalation. For example, intercalation in graphite can lead to superconductivity and is crucial in the working cycle of modern batteries and supercapacitors. Intercalation involves complex diffusion processes along and across the layers; however, the microscopic mechanisms and dynamics of these processes are not well understood. Here we report on a novel mechanism for intercalation and entrapment of alkali atoms under epitaxial graphene. We find that the intercalation is adjusted by the van der Waals interaction, with the dynamics governed by defects anchored to graphene wrinkles. Our findings are relevant for the future design and application of graphene-based nano-structures. Similar mechanisms can also have a role for intercalation of layered materials.

Suggested Citation

  • M. Petrović & I. Šrut Rakić & S. Runte & C. Busse & J. T. Sadowski & P. Lazić & I. Pletikosić & Z.-H. Pan & M. Milun & P. Pervan & N. Atodiresei & R. Brako & D. Šokčević & T. Valla & T. Michely & M. K, 2013. "The mechanism of caesium intercalation of graphene," Nature Communications, Nature, vol. 4(1), pages 1-8, December.
    • Handle: RePEc:nat:natcom:v:4:y:2013:i:1:d:10.1038_ncomms3772
    DOI: 10.1038/ncomms3772
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