Seebeck-driven transverse thermoelectric generation

Weinan Zhou, Kaoru Yamamoto, Asuka Miura, Ryo Iguchi, Yoshio Miura, Ken ichi Uchida, Yuya Sakuraba

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

When a temperature gradient is applied to a closed circuit comprising two different conductors, a charge current is generated via the Seebeck effect1. Here, we utilize the Seebeck-effect-induced charge current to drive ‘transverse’ thermoelectric generation, which has great potential for energy harvesting and heat sensing applications owing to the orthogonal geometry of the heat-to-charge-current conversion2–9. We found that, in a closed circuit comprising thermoelectric and magnetic materials, artificial hybridization of the Seebeck effect into the anomalous Hall effect10 enables transverse thermoelectric generation with a similar symmetry to the anomalous Nernst effect11–27. Surprisingly, the Seebeck-effect-driven transverse thermopower can be several orders of magnitude larger than the anomalous-Nernst-effect-driven thermopower, which is clearly demonstrated by our experiments using Co2MnGa/Si hybrid materials. The unconventional approach could be a breakthrough in developing applications of transverse thermoelectric generation.

Original languageEnglish
Pages (from-to)463-467
Number of pages5
JournalNature Materials
Volume20
Issue number4
DOIs
Publication statusPublished - 2021 Apr
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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