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Tuning the interfacial spin-orbit coupling with ferroelectricity.


ABSTRACT: Detection and manipulation of spin current lie in the core of spintronics. Here we report an active control of a net spin Hall angle, θSHE(net), in Pt at an interface with a ferroelectric material PZT (PbZr0.2Ti0.8O3), using its ferroelectric polarization. The spin Hall angle in the ultra-thin Pt layer is measured using the inverse spin Hall effect with a pulsed tunneling current from a ferromagnetic La0.67Sr0.33MnO3 electrode. The effect of the ferroelectric polarization on θSHE(net) is enhanced when the thickness of the Pt layer is reduced. When the Pt layer is thinner than 6 nm, switching the ferroelectric polarization even changes the sign of θSHE(net). This is attributed to the reversed polarity of the spin Hall angle in the 1st-layer Pt at the PZT/Pt interface when the ferroelectric polarization is inverted, as supported by the first-principles calculations. These findings suggest a route for designing future energy efficient spin-orbitronic devices using ferroelectric control.

SUBMITTER: Fang M 

PROVIDER: S-EPMC7250895 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature

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Detection and manipulation of spin current lie in the core of spintronics. Here we report an active control of a net spin Hall angle, θ<sub>SHE</sub>(net), in Pt at an interface with a ferroelectric material PZT (PbZr<sub>0.2</sub>Ti<sub>0.8</sub>O<sub>3</sub>), using its ferroelectric polarization. The spin Hall angle in the ultra-thin Pt layer is measured using the inverse spin Hall effect with a pulsed tunneling current from a ferromagnetic La<sub>0.67</sub>Sr<sub>0.33</sub>MnO<sub>3</sub> el  ...[more]

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