Direct electronic measurement of Peltier cooling and heating in graphene

Ivan Vera Marun, J.J. van den Berg, F.K. Dejene, B.J. van Wees

    Research output: Contribution to journalArticlepeer-review


    Thermoelectric effects allow the generation of electrical power from waste heat and the electrical control of cooling and heating. Remarkably, these effects are also highly sensitive to the asymmetry in the density of states around the Fermi energy and can therefore be exploited as probes of distortions in the electronic structure at the nanoscale. Here we consider two-dimensional graphene as an excellent nanoscale carbon material for exploring the interaction between electronic and thermal transport phenomena, by presenting a direct and quantitative measurement of the Peltier component to electronic cooling and heating in graphene. Thanks to an architecture including nanoscale thermometers, we detected Peltier component modulation of up to 15 mK for currents of 20 μA at room temperature and observed a full reversal between Peltier cooling and heating for electron and hole regimes. This fundamental thermodynamic property is a complementary tool for the study of nanoscale thermoelectric transport in two-dimensional materials.
    Original languageEnglish
    Article number11525
    JournalNature Communications
    Publication statusPublished - 10 May 2016

    Research Beacons, Institutes and Platforms

    • National Graphene Institute


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