Journal
INFOMAT
Volume 2, Issue 5, Pages 968-974Publisher
WILEY
DOI: 10.1002/inf2.12095
Keywords
Coupled valley and spin Hall effect; Perpendicular magnetic anisotropy; WSe2
Categories
Funding
- SRC [70NANB17H041]
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It is generally accepted that perpendicular magnetic anisotropy (PMA) magnets are preferred over in-plane magnetic anisotropy (IMA) magnets in data storage applications owing to their large thermal stability even at ultra-scaled dimensions. To efficiently and deterministically switch a PMA, out-of-plan spin current is required. However, conventional giant spin Hall effect (GSHE) materials only produce spin currents with in-plane polarization. Our work, on the other hand, demonstrated for the first time that out-of-plane spin currents can indeed be generated by applying electric filed to monolayer WSe(2)at room temperature and the spin information was detected by a graphene channel. Supported by theoretical calculations, we found that the interfacial polarization between graphene and WSe(2)to be similar to 38% assuming the ferromagnetic detector's polarization efficiency to be similar to 4%. Moreover, the spin polarization is determined by the polarity of the applied electric field.
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