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.
basic_science · Level V
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- Record sourced from PubMed, PMID 33274946.
- Also identified by DOI 10.1021/acs.nanolett.0c03499.
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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<sub>2</sub>) 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<sub>2</sub> interlayer in a Pt/YIG structure. Such an enhancement in the LSSE performance of Pt/holey MoS<sub>2</sub>/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<sub>2</sub> interlayers and pave the way toward large-area TE energy-harvesting devices in two-dimensional transition metal dichalcogenide materials.