Signature of magnon Nernst effect in an antiferromagnetic insulator

ORAL

Abstract

A magnon Nernst effect, an antiferromagnetic analog of the magnon Hall effect in ferromagnetic insulators, has been studied experimentally for the layered antiferromagnetic insulator MnPS3 in contact with two Pt strips [Y. Shiomi, R. Takashima, and E. Saitoh, Phys. Rev. B 96, 134425 (2017)]. Thermoelectric voltage in the Pt strips grown on MnPS3 single crystals exhibits nonmonotonic temperature dependence at low temperatures, which is unlikely to be explained by electronic origins in Pt but can be ascribed to the inverse spin Hall voltage induced by a magnon Nernst effect. Control of antiferromagnetic domains in the MnPS3 crystal by magnetoelectric cooling is found to modulate the low-temperature thermoelectric voltage in Pt, which is evidence consistent with the emergence of the magnon Nernst effect in Pt-MnPS3 hybrid structures.

*This work was supported by the JST ERATO Spin Quantum Rectification Project (Grant No. JPMJER1402), JSPS KAKENHI (Grants No. 17H04806, No. JP16H00977, No. 16K13827, and No. 15J01700), and MEXT (Innovative Area “Nano Spin Conversion Science” (Grant No. 26103005)).

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Presenters

  • Yuki Shiomi

    • Quantum-Phase Electronics Center, University of Tokyo
    • Quantum-Phase Electronics Center, School of Engineering, the University of Tokyo

Authors

  • Yuki Shiomi

    • Quantum-Phase Electronics Center, University of Tokyo
    • Quantum-Phase Electronics Center, School of Engineering, the University of Tokyo

  • Rina Takashima

    • Department of Physics, Kyoto University
    • Kyoto University

  • Eiji Saitoh

    • Tohoku Univ
    • Advanced Institute for Materials Research, Tohoku University
    • Tohoku Univ.
    • Institute for Materials Research, Tohoku University