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Facilitating field-free perpendicular magnetization switching with a Berry curvature dipole in a Weyl semimetal by Li, Dong; Liu, Xing-Yu; Ye, Xing-Guo; Pan, Zhen-Cun; Xu, Wen-Zheng; Zhu, Peng-Fei; Wang, An-Qi; Watanabe, Kenji; Taniguchi, Takashi; Liao, Zhi-Min is a scholarly article available to read on EtoBox.

What is Facilitating field-free perpendicular magnetization switching with a Berry curvature dipole in a Weyl semimetal about?

We report the synergy between orbital and spin-orbit torques in WTe2/Fe3GeTe2 heterostructures characterized by a Berry curvature dipole. By applying a current along the a axis in WTe2, we detect an out-of-plane magnetization in the system, which we attribute to nonequilibrium orbital magnetization linked to the Berry curvature dipole based on first-principles calculations, manifesting as the orbital Edelstein effect. This effect generates orbital torques that enable field-free perpendicular magnetization switching. Furthermore, by applying a relatively small current along the a axis and a pulsed current along the b axis in WTe2, we demonstrate controllable field-free magnetization switching of the adjacent Fe3GeTe2 layer, independently manipulating the orbital and spin-orbit torques. Our findings not only enhance the understanding of the collaborative dynamics between these torques but also suggest potential applications in magnetoresistive random-access memory.

Author

Li, Dong; Liu, Xing-Yu; Ye, Xing-Guo; Pan, Zhen-Cun; Xu, Wen-Zheng; Zhu, Peng-Fei; Wang, An-Qi; Watanabe, Kenji; Taniguchi, Takashi; Liao, Zhi-Min

Published

2024

Language

EN