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Triplon current generation in solids

Author

Listed:
  • Yao Chen

    (Tohoku University)

  • Masahiro Sato

    (Ibaraki University)

  • Yifei Tang

    (Tohoku University)

  • Yuki Shiomi

    (The University of Tokyo)

  • Koichi Oyanagi

    (Tohoku University
    Iwate University)

  • Takatsugu Masuda

    (The University of Tokyo)

  • Yusuke Nambu

    (Tohoku University
    Japan Science and Technology Agency
    Tohoku University)

  • Masaki Fujita

    (Tohoku University)

  • Eiji Saitoh

    (Tohoku University
    The University of Tokyo
    The University of Tokyo
    Tohoku University)

Abstract

A triplon refers to a fictitious particle that carries angular momentum S=1 corresponding to the elementary excitation in a broad class of quantum dimerized spin systems. Such systems without magnetic order have long been studied as a testing ground for quantum properties of spins. Although triplons have been found to play a central role in thermal and magnetic properties in dimerized magnets with singlet correlation, a spin angular momentum flow carried by triplons, a triplon current, has not been detected yet. Here we report spin Seebeck effects induced by a triplon current: triplon spin Seebeck effect, using a spin-Peierls system CuGeO3. The result shows that the heating-driven triplon transport induces spin current whose sign is positive, opposite to the spin-wave cases in magnets. The triplon spin Seebeck effect persists far below the spin-Peierls transition temperature, being consistent with a theoretical calculation for triplon spin Seebeck effects.

Suggested Citation

  • Yao Chen & Masahiro Sato & Yifei Tang & Yuki Shiomi & Koichi Oyanagi & Takatsugu Masuda & Yusuke Nambu & Masaki Fujita & Eiji Saitoh, 2021. "Triplon current generation in solids," Nature Communications, Nature, vol. 12(1), pages 1-7, December.
    • Handle: RePEc:nat:natcom:v:12:y:2021:i:1:d:10.1038_s41467-021-25494-7
    DOI: 10.1038/s41467-021-25494-7
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