Article Apparent nonreciprocal transport in FeSe bulk crystals

Taichi Terashima SAMURAI ORCID (National Institute for Materials Science) ; Shinya Uji SAMURAI ORCID (National Institute for Materials Science) ; Yuji Matsuda (Kyoto University) ; Takasada Shibauchi (University of Tokyo) ; Shigeru Kasahara (Okayama University)

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Taichi Terashima, Shinya Uji, Yuji Matsuda, Takasada Shibauchi, Shigeru Kasahara. Apparent nonreciprocal transport in FeSe bulk crystals. Physical Review B. 2025, 111 (5), 054521. https://doi.org/10.48505/nims.5343

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(abstract)

We performed low-frequency ac first- and second-harmonic resistance measurements and dc I − V measurements on bulk FeSe crystals in a temperature range between 1.8 and 150 K and in mag- netic field up to 14 T. We observed considerable second-harmonic resistance, indicative of nonre- ciprocal charge transport, in some samples. By examining correlation between contact resistances and second-harmonic signals, we concluded that the second-harmonic resistance was not due to the genuine nonreciprocal transport effect but was caused by joule heating at a current contact through the thermoelectric effect. Our conclusion is consistent with a recent preprint (Nagata et al., arXiv:2409.01715), in which the authors reported a zero-field superconducting diode effect in devices fabricated with FeSe flakes and attributed it to the thermoelectric effect.

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Keyword: nonreciprocal transport, iron-based superconductor, FeSe

Date published: 2025-02-21

Publisher: American Physical Society (APS)

Journal:

  • Physical Review B (ISSN: 1550235X) vol. 111 issue. 5 054521

Funding:

  • Japan Society for the Promotion of Science JP19H05824
  • Japan Society for the Promotion of Science JP22H04485
  • Japan Society for the Promotion of Science JP21H04443
  • Japan Society for the Promotion of Science JP22H00105
  • Japan Society for the Promotion of Science JP23H00089
  • Japan Society for the Promotion of Science JP22H01173
  • Japan Society for the Promotion of Science JP22KK0036
  • Ministry of Education, Culture, Sports, Science and Technology

Manuscript type: Author's version (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5343

First published URL: https://doi.org/10.1103/PhysRevB.111.054521

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Updated at: 2025-02-26 12:30:21 +0900

Published on MDR: 2025-02-26 12:30:22 +0900

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