Enhanced photoenergy harvesting and extreme Thomson effect in hydrodynamic electronic systems

Trond I. Andersen, Thomas Smith, Alessandro Principi

    Research output: Contribution to journalArticlepeer-review

    50 Downloads (Pure)

    Abstract

    The thermoelectric (TE) properties of a material are dramatically altered when electron-electron interactions become the dominant scattering mechanism. In the degenerate hydrodynamic regime, the thermal conductivity is reduced and becomes a decreasing function of the electronic temperature, due to a violation of the Wiedemann-Franz law. We here show how this peculiar temperature dependence gives rise to new striking TE phenomena. These include an 80-fold increase in TE efficiency compared to the Wiedemann-Franz regime, dramatic qualitative changes in the steady state temperature profile, and an anomalously large Thomson effect. In graphene, which we pay special attention to here, these effects are further amplified due to a doubling of the thermopower.
    Original languageEnglish
    JournalPhysical Review Letters
    DOIs
    Publication statusPublished - 26 Apr 2019

    Fingerprint

    Dive into the research topics of 'Enhanced photoenergy harvesting and extreme Thomson effect in hydrodynamic electronic systems'. Together they form a unique fingerprint.

    Cite this