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説明:

Angular-momentum transport provides a pathway for controlling energy flow in solids beyond conventional charge-based mechanisms. Although spin currents are known to mediate spin-caloritronic phenomena such as the spin Peltier effect (SPE), the role of orbital angular momentum (OAM) in heat transport remains largely unexplored. Here, we demonstrate OAM-driven temperature modulation via the SPE in yttrium-iron-garnet/Pt/CuOx heterostructures. Using wedge-shaped CuOx layers combined with spatially resolved active thermal measurement techniques, we map the continuous thickness dependence and quantitatively disentangle the spin- and orbital-current-mediated contributions within a single device. The orbital-mediated component exhibits a pronounced maximum at an intermediate thickness, revealing a characteristic length scale for interfacial OAM generation and propagation at the Cu/CuOx interface. These results provide direct experimental evidence that charge-current-driven OAM can drive SPE-induced temperature modulation, establishing interfacial orbital processes as an additional channel for heat transport and providing a pathway toward spin-orbit caloritronics.

権利情報:

• Creative Commons BY Attribution 4.0 International
  

キーワード: spin caloritronics, spin Peltier effect, orbital angular momentum, lock-in thermography

刊行年月日: 2026-10-02

出版者: American Association for the Advancement of Science (AAAS)

掲載誌:

• Science Advances (ISSN: 23752548) vol. 12 issue. 40 eaej1838

研究助成金:

• JSPS 22H04965
• JST JPMJER2201

原稿種別: 出版者版 (Version of record)

MDR DOI:

公開URL: https://doi.org/10.1126/sciadv.aej1838

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更新時刻: 2026-10-30 04:17:09 +0900

MDRでの公開時刻: 2026-11-02 10:32:55 +0900