Molecular Electronics: Insight from First-Principles Transport Simulations

Magnus Paulsson, Thomas Frederiksen, Mads Brandbyge

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    Conduction properties of nanoscale contacts can be studied using first-principles simulations. Such calculations give insight into details behind the conductance that is not readily available in experiments. For example, we may learn how the bonding conditions of a molecule to the electrodes affect the electronic transport. Here we describe key computational ingredients and discuss these in relation to simulations for scanning tunneling microscopy (STM) experiments with C-60 molecules where the experimental geometry is well characterized. We then show how molecular dynamics simulations may be combined with transport calculations to study more irregular situations, such as the evolution of a nanoscale contact with the mechanically controllable break-junction technique. Finally we discuss calculations of inelastic electron tunnelling spectroscopy as a characterization technique that reveals information about the atomic arrangement and transport channels.
    Original languageEnglish
    JournalChimia
    Volume64
    Issue number6
    Pages (from-to)350-355
    ISSN0009-4293
    DOIs
    Publication statusPublished - 2010

    Keywords

    • Density functional theory
    • Molecular dynamics
    • Electron transport
    • Molecular vibrations
    • Nanoscale contacts

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