Localized Edge Vibrations and Edge Reconstruction by Joule Heating in Graphene Nanostructures

Mads Engelund, Joachim Alexander Fürst, Antti-Pekka Jauho, Mads Brandbyge

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    Abstract

    Control of the edge topology of graphene nanostructures is critical to graphene-based electronics. A means of producing atomically smooth zigzag edges using electronic current has recently been demonstrated in experiments [Jia et al., Science 323, 1701 (2009)]. We develop a microscopic theory for current-induced edge reconstruction using density functional theory. Our calculations provide evidence for localized vibrations at edge interfaces involving unpassivated armchair edges. We demonstrate that these vibrations couple to the current, estimate their excitation by Joule heating, and argue that they are the likely cause of the reconstructions observed in the experiments.
    Original languageEnglish
    JournalPhysical Review Letters
    Volume104
    Issue number3
    Pages (from-to)036807
    ISSN0031-9007
    DOIs
    Publication statusPublished - 2010

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    Copyright 2010 American Physical Society

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