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Peer-reviewedCC BYNature communications

Transport evidence for the orbital Nernst effect.

  • Wen-Yuan Li1,2
  • Chun-Chi Chang1
  • Ssu-Yen Huang1,3
  • Danru Qu4,5
5 affiliations
  1. 1Department of Physics, National Taiwan University, Taipei, Taiwan.
  2. 2Center for Condensed Matter Sciences, National Taiwan University, Taipei, Taiwan.
  3. 3Center of Atomic Initiatives for New Materials, National Taiwan University, Taipei, Taiwan.
  4. 4Center for Condensed Matter Sciences, National Taiwan University, Taipei, Taiwan. [email protected].
  5. 5Center of Atomic Initiatives for New Materials, National Taiwan University, Taipei, Taiwan. [email protected].
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Abstract

Orbital Hall effects have recently attracted significant attention for generating substantial orbital angular momentum currents in both strong- and weak-spin-orbit-coupling materials. Despite extensive theoretical and experimental progress on the orbital Hall effect, its thermal counterpart, in which a temperature gradient drives a transverse orbital current, known as the orbital Nernst effect, has remained experimentally elusive. Here, we report the first experimental evidence for the orbital Nernst effect by measuring the magneto-thermopower in the yttrium iron garnet (YIG)/Pt/CuOx heterostructures. Through systematic comparison with the YIG/Pt and YIG/CuOx heterostructures, we show that both the magneto-thermopower and the magnetoresistance for YIG/Pt/CuOx are markedly enhanced due to the contributions from the orbital Nernst effect and the orbital Hall effect in CuOx, respectively. Our experimental evidence for the orbital Nernst effect supports the orbital degree of freedom as a promising route for heat-energy harvesting and orbital angular momentum thermal transport in earth-abundant materials.

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Cite

BibTeXRIS
BibTeX
@article{li2026transport,
  title = {{Transport evidence for the orbital Nernst effect.}},
  author = {Wen-Yuan Li and Chun-Chi Chang and Ssu-Yen Huang and Danru Qu},
  journal = {Nature communications},
  year = {2026},
  month = sep,
  doi = {10.1038/s41467-026-77878-2},
  url = {https://europepmc.org/article/MED/42907434},
  note = {CC BY},
}
RIS
TY  - JOUR
TI  - Transport evidence for the orbital Nernst effect.
AU  - Wen-Yuan Li
AU  - Chun-Chi Chang
AU  - Ssu-Yen Huang
AU  - Danru Qu
PY  - 2026
DA  - 2026/09/22
JO  - Nature communications
DO  - 10.1038/s41467-026-77878-2
UR  - https://europepmc.org/article/MED/42907434
AB  - Orbital Hall effects have recently attracted significant attention for generating substantial orbital angular momentum currents in both strong- and weak-spin-orbit-coupling materials. Despite extensive theoretical and experimental progress on the orbital Hall effect, its thermal counterpart, in which a temperature gradient drives a transverse orbital current, known as the orbital Nernst effect, has remained experimentally elusive. Here, we report the first experimental evidence for the orbital Nernst effect by measuring the magneto-thermopower in the yttrium iron garnet (YIG)/Pt/CuOx heterostructures. Through systematic comparison with the YIG/Pt and YIG/CuOx heterostructures, we show that both the magneto-thermopower and the magnetoresistance for YIG/Pt/CuOx are markedly enhanced due to the contributions from the orbital Nernst effect and the orbital Hall effect in CuOx, respectively. Our experimental evidence for the orbital Nernst effect supports the orbital degree of freedom as a promising route for heat-energy harvesting and orbital angular momentum thermal transport in earth-abundant materials.
SN  - 2041-1723
ER  -