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Title: Spin-current-driven thermoelectric generation based on interfacial spin-orbit coupling

Abstract

The longitudinal spin Seebeck effect (SSE) in Bi{sub 2}O{sub 3}/Cu/yttrium-iron-garnet (YIG) devices has been investigated. When an out-of-plane temperature gradient is applied to the Bi{sub 2}O{sub 3}/Cu/YIG device, a spin current is generated across the Cu/YIG interface via the SSE and then converted into electric voltage due to the spin–orbit coupling at the Bi{sub 2}O{sub 3}/Cu interface. The sign of the SSE voltage in the Bi{sub 2}O{sub 3}/Cu/YIG devices is opposite to that induced by the conventional inverse spin Hall effect in Pt/YIG devices. The SSE voltage in the Bi{sub 2}O{sub 3}/Cu/YIG devices disappears in the absence of the Bi{sub 2}O{sub 3} layer and its thermoelectric conversion efficiency is independent of the Cu thickness, indicating the important role of the Bi{sub 2}O{sub 3}/Cu interface. This result demonstrates that not only the bulk inverse spin Hall effect but also the spin–orbit coupling near the interface can be used for SSE-based thermoelectric generation.

Authors:
;  [1]; ;  [2];  [3];  [1];  [3];  [4];  [1];  [3];  [1];  [3];  [3];  [3]
  1. Institute for Materials Research, Tohoku University, Sendai 980-8577 (Japan)
  2. Institute for Solid State Physics, University of Tokyo, Kashiwa, Chiba 277-8581 (Japan)
  3. (Japan)
  4. Center for Emergent Matter Science, RIKEN, Wako, Saitama 351-0198 (Japan)
Publication Date:
OSTI Identifier:
22590792
Resource Type:
Journal Article
Journal Name:
Applied Physics Letters
Additional Journal Information:
Journal Volume: 108; Journal Issue: 24; Other Information: (c) 2016 Author(s); Country of input: International Atomic Energy Agency (IAEA); Journal ID: ISSN 0003-6951
Country of Publication:
United States
Language:
English
Subject:
71 CLASSICAL AND QUANTUM MECHANICS, GENERAL PHYSICS; BISMUTH OXIDES; EFFICIENCY; EQUIPMENT; FERRITE GARNETS; INTERFACES; IRON OXIDES; LAYERS; L-S COUPLING; SEEBECK EFFECT; TEMPERATURE GRADIENTS; THERMOELECTRIC CONVERSION; THICKNESS

Citation Formats

Yagmur, A., E-mail: ahmetyagmur@imr.tohoku.ac.jp, Iguchi, R., Karube, S., Otani, Y., Center for Emergent Matter Science, RIKEN, Wako, Saitama 351-0198, Uchida, K., E-mail: kuchida@imr.tohoku.ac.jp, PRESTO, Japan Science and Technology Agency, Saitama 332-0012, Kondou, K., Kikkawa, T., WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Saitoh, E., WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Spin Quantum Rectification Project, ERATO, Japan Science and Technology Agency, Sendai 980-8577, and Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195. Spin-current-driven thermoelectric generation based on interfacial spin-orbit coupling. United States: N. p., 2016. Web. doi:10.1063/1.4953879.
Yagmur, A., E-mail: ahmetyagmur@imr.tohoku.ac.jp, Iguchi, R., Karube, S., Otani, Y., Center for Emergent Matter Science, RIKEN, Wako, Saitama 351-0198, Uchida, K., E-mail: kuchida@imr.tohoku.ac.jp, PRESTO, Japan Science and Technology Agency, Saitama 332-0012, Kondou, K., Kikkawa, T., WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Saitoh, E., WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Spin Quantum Rectification Project, ERATO, Japan Science and Technology Agency, Sendai 980-8577, & Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195. Spin-current-driven thermoelectric generation based on interfacial spin-orbit coupling. United States. doi:10.1063/1.4953879.
Yagmur, A., E-mail: ahmetyagmur@imr.tohoku.ac.jp, Iguchi, R., Karube, S., Otani, Y., Center for Emergent Matter Science, RIKEN, Wako, Saitama 351-0198, Uchida, K., E-mail: kuchida@imr.tohoku.ac.jp, PRESTO, Japan Science and Technology Agency, Saitama 332-0012, Kondou, K., Kikkawa, T., WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Saitoh, E., WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577, Spin Quantum Rectification Project, ERATO, Japan Science and Technology Agency, Sendai 980-8577, and Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195. Mon . "Spin-current-driven thermoelectric generation based on interfacial spin-orbit coupling". United States. doi:10.1063/1.4953879.
@article{osti_22590792,
title = {Spin-current-driven thermoelectric generation based on interfacial spin-orbit coupling},
author = {Yagmur, A., E-mail: ahmetyagmur@imr.tohoku.ac.jp and Iguchi, R. and Karube, S. and Otani, Y. and Center for Emergent Matter Science, RIKEN, Wako, Saitama 351-0198 and Uchida, K., E-mail: kuchida@imr.tohoku.ac.jp and PRESTO, Japan Science and Technology Agency, Saitama 332-0012 and Kondou, K. and Kikkawa, T. and WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577 and Saitoh, E. and WPI Advanced Institute for Materials Research, Tohoku University, Sendai 980-8577 and Spin Quantum Rectification Project, ERATO, Japan Science and Technology Agency, Sendai 980-8577 and Advanced Science Research Center, Japan Atomic Energy Agency, Tokai 319-1195},
abstractNote = {The longitudinal spin Seebeck effect (SSE) in Bi{sub 2}O{sub 3}/Cu/yttrium-iron-garnet (YIG) devices has been investigated. When an out-of-plane temperature gradient is applied to the Bi{sub 2}O{sub 3}/Cu/YIG device, a spin current is generated across the Cu/YIG interface via the SSE and then converted into electric voltage due to the spin–orbit coupling at the Bi{sub 2}O{sub 3}/Cu interface. The sign of the SSE voltage in the Bi{sub 2}O{sub 3}/Cu/YIG devices is opposite to that induced by the conventional inverse spin Hall effect in Pt/YIG devices. The SSE voltage in the Bi{sub 2}O{sub 3}/Cu/YIG devices disappears in the absence of the Bi{sub 2}O{sub 3} layer and its thermoelectric conversion efficiency is independent of the Cu thickness, indicating the important role of the Bi{sub 2}O{sub 3}/Cu interface. This result demonstrates that not only the bulk inverse spin Hall effect but also the spin–orbit coupling near the interface can be used for SSE-based thermoelectric generation.},
doi = {10.1063/1.4953879},
journal = {Applied Physics Letters},
issn = {0003-6951},
number = 24,
volume = 108,
place = {United States},
year = {2016},
month = {6}
}