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

Yagmur, A.*; Karube, Shutaro*; Uchida, Kenichi*; Kondo, Kota*; Iguchi, Ryo*; Kikkawa, Takashi*; Otani, Yoshichika*; Saito, Eiji

The longitudinal spin Seebeck effect (SSE) in Bi $_{2}$ O $_{3}$ /Cu/yttrium-iron-garnet (YIG) devices has been investigated. When an out-of-plane temperature gradient is applied to the Bi $_{2}$ O $_{3}$ /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 $-orbit coupling at the Bi$_{2}$$ O $_{3}$ /Cu interface. The sign of the SSE voltage in the Bi $_{2}$ O $_{3}$ /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 $_{2}$ O $_{3}$ /Cu/YIG devices disappears in the absence of the Bi $_{2}$ O $_{3}$ layer and its thermoelectric conversion efficiency is independent of the Cu thickness, indicating the important role of the Bi $_{2}$ O $_{3}$ /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.

Language	:	English
Journal	:	Applied Physics Letters
Volume	:	108
Number	:	24
Pages	:	p.242409_1 - 242409_4
Publication Year/Month	:	2016/06
Meeting title	:
Held date	:
Location (city)	:
Location (country)	:
Patent information	:
PDF	:
Paper URL	:	https://doi.org/10.1063/1.4953879
DOI for research data	:
Keywords	:	no keyword
Research Facility	:
Press Release	:
Article of JAEA R&D Review	:
Cooperating Institute	:

Accesses	:	- Accesses
Web of Science® Times Cited Count	:	Times Cited Count： If you would like to get the latest times cited, please access the Web of Science®. http://www.webofknowledge.com/wos
InCites™	:	Percentile:33.32 Category:Physics, Applied
Altmetrics	:

Registration No. : AA20170069
JAEA Abstracts No. : 45000576
Paper Submission No. : 18843

[CLARIVATE ANALYTICS], [WEB OF SCIENCE], [HIGHLY CITED PAPER & CUP LOGO] and [HOT PAPER & FIRE LOGO] are trademarks of Clarivate Analytics, and/or its affiliated company or companies, and used herein by permission and/or license.