Thermopower switching by magnetic field: first-principles calculations

Volodymyr V. Maslyuk, Steven Achilles, Leonid Sandratskii, Mads Brandbyge, Ingrid Mertig

    Research output: Contribution to journalJournal articleResearchpeer-review

    Abstract

    We present first-principles studies of the thermopower of the organometallic V4Bz5 molecule attached between Co electrodes with noncollinear magnetization directions. Different regimes in the formation of the noncollinear magnetic state of the molecule lead to a remarkable nonmonotonous dependence of the thermopower on the angle between the magnetizations of the electrodes. This complex behavior is explained by the resonant properties of the electron transmission. Consequently, the nanocontacts can be utilized for local heating or cooling controlled by the external magnetic field.
    Original languageEnglish
    Article number081403
    JournalPhysical Review B
    Volume88
    Issue number8
    Number of pages5
    ISSN1098-0121
    DOIs
    Publication statusPublished - 2013

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