Enhanced Spin Seebeck Thermopower in Pt/Holey MoS2/Y3Fe5O12Hybrid Structure
- Authors
- Lee, Won-Yong; Park, No-Won; Kim, Gil-Sung; Kang, Min-Sung; Choi, Jae Won; Choi, Kwang-Yong; Jang, Ho Won; Saitoh, Eiji; Lee, Sang-Kwon
- Issue Date
- 13-Jan-2021
- Publisher
- American Chemical Society
- Keywords
- longitudinal spin Seebeck effect; molybdenum disulfide; Rashba-Edelstein effect; spin accumulation; spin-to-charge conversion
- Citation
- Nano Letters, v.21, no.1, pp 189 - 196
- Pages
- 8
- Journal Title
- Nano Letters
- Volume
- 21
- Number
- 1
- Start Page
- 189
- End Page
- 196
- URI
- https://scholarworks.bwise.kr/cau/handle/2019.sw.cau/52501
- DOI
- 10.1021/acs.nanolett.0c03499
- ISSN
- 1530-6984
1530-6992
- Abstract
- We first observed the spin-to-charge conversion due to both the inverse Rashba-Edelstein effect (IREE) and inverse spin-Hall effect in a holey multilayer molybdenum disulfide (MoS2) intermediate layer in a Pt/YIG structure via LSSE measurements under nonequilibrium magnetization. We found an enhancement of approximately 238%, 307%, and 290% in the longitudinal spin Seebeck effect (LSSE) voltage, spin-to-charge current, and thermoelectric (TE) power factor, respectively, compared with the monolayer MoS2 interlayer in a Pt/YIG structure. Such an enhancement in the LSSE performance of Pt/holey MoS2/YIG can be explained by the improvement of spin accumulation in the Pt layer by induced spin fluctuation as well as increased additional spin-to-charge conversion due to in-plane IREE. Our findings represent a significant achievement in the understanding of spin transport in atomically thin MoS2 interlayers and pave the way toward large-area TE energy-harvesting devices in two-dimensional transition metal dichalcogenide materials. © 2020 American Chemical Society.
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