Tuning the interfacial spin-orbit coupling with ferroelectricity

Mei Fang, Yanmei Wang, Hui Wang, Yusheng Hou, Eric Vetter, Yunfang Kou, Wenting Yang, Lifeng Yin, Zhu Xiao, Zhou Li, Lu Jiang, Ho Nyung Lee, Shufeng Zhang, Ruqian Wu, Xiaoshan Xu (), Dali Sun () and Jian Shen ()
Additional contact information
Mei Fang: Fudan University
Yanmei Wang: Fudan University
Hui Wang: Central South University
Yusheng Hou: University of California
Eric Vetter: North Carolina State University
Yunfang Kou: Fudan University
Wenting Yang: Fudan University
Lifeng Yin: Fudan University
Zhu Xiao: Central South University
Zhou Li: Central South University
Lu Jiang: Oak Ridge National Laboratory
Ho Nyung Lee: Oak Ridge National Laboratory
Shufeng Zhang: University of Arizona
Ruqian Wu: University of California
Xiaoshan Xu: University of Nebraska
Dali Sun: North Carolina State University
Jian Shen: Fudan University

Nature Communications, 2020, vol. 11, issue 1, 1-8

Abstract: 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.

Date: 2020
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DOI: 10.1038/s41467-020-16401-7

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