Tunneling Seebeck and Anomalous Nernst effects in three-dimensional topological insulators

ORAL

Abstract

We theoretically investigate the longitudinal (Seebeck) and transverse (Nernst) thermopowers generated by thermally-induced tunneling across a magnetic barrier on the surface of a three-dimensional insulator. As a manifestation of Klein tunneling, the tunneling Seebeck coefficient exhibits oscillatory behavior with respect to the barrier thickness. Moreover, in spite of the absence of a source of spin polarization (only the barrier is magnetic), the tunneling anomalous Nernst coefficient is not only finite but can even be much larger than its Seebeck counterpart.

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Authors

  • Chenghao Shen

    State University of New York at Buffalo

  • Benedikt Scharf

    State Univ of NY - Buffalo, State University of New York at Buffalo, University at Buffalo - SUNY

  • Alex Matos-Abiague

    State University of New York at Buffalo, University at Buffalo - SUNY, University at Buffalo

  • Igor Zutic

    University at Buffalo, State University of New York at Buffalo, SUNY at Buffalo, Dept. of Physics, University at Buffalo, State University of New York, University at Buffalo - SUNY, SUNY Buffalo