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Room temperature energy-efficient spin-orbit torque switching in two-dimensional van der Waals Fe<sub>3</sub>GeTe<sub>2</sub> induced by topological insulators

Physics

Room temperature energy-efficient spin-orbit torque switching in two-dimensional van der Waals Fe<sub>3</sub>GeTe<sub>2</sub> induced by topological insulators

H. Wang, H. Wu, et al.

Explore the groundbreaking research conducted by Haiyu Wang and colleagues, showcasing room-temperature spin-orbit torque driven magnetization switching in an all-van der Waals heterostructure. This innovative approach utilizing Bi2Te3 and Fe3GeTe2 paves the way for next-generation 2D spintronic devices!

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Playback language: English
Abstract
Two-dimensional (2D) ferromagnetic materials hold promise for next-generation spintronic devices. This paper demonstrates room-temperature spin-orbit torque (SOT) driven magnetization switching in an all-van der Waals (vdW) heterostructure of Bi<sub>2</sub>Te<sub>3</sub>/Fe<sub>3</sub>GeTe<sub>2</sub> (FGT). The topological insulator Bi<sub>2</sub>Te<sub>3</sub> enhances FGT's Curie temperature and acts as a spin current source, enabling switching at a low current density (~2.2 × 10<sup>5</sup> A/cm<sup>2</sup>) with SOT efficiency of ~2.69. Temperature and thickness-dependent SOT efficiency confirm the topological origin of the enhanced SOT. This all-vdW SOT structure lays a foundation for room-temperature 2D spintronic devices.
Publisher
Nature Communications
Published On
Aug 24, 2023
Authors
Haiyu Wang, Hao Wu, Jie Zhang, Yingjie Liu, Dongdong Chen, Chandan Pandey, Jialiang Yin, Dahai Wei, Na Lei, Shuyuan Shi, Haichang Lu, Peng Li, Albert Fert, Kang L. Wang, Tianxiao Nie, Weisheng Zhao
Tags
ferromagnetic materials
spintronic devices
room-temperature
spin-orbit torque
van der Waals heterostructure
topological insulator
magnetization switching
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