Enhanced Spin Seebeck Thermopower in Pt/Holey MoS<sub>2</sub>/Y<sub>3</sub>Fe<sub>5</sub>O<sub>12</sub> Hybrid Structure
Won‐Yong Lee, No‐Won Park, Gil‐Sung Kim, Min‐Sung Kang, Jae Won Choi, Kwang‐Yong Choi, Ho Won Jang, Eiji Saitoh, Sang‐Kwon Lee
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 (MoS 2 ) 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 MoS 2 interlayer in a Pt/YIG structure. Such an enhancement in the LSSE performance of Pt/holey MoS 2 /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 MoS 2 interlayers and pave the way toward large-area TE energy-harvesting devices in two-dimensional transition metal dichalcogenide materials.