Inverse orbital Hall effect and orbitronic terahertz emission observed in the materials with weak spin-orbit coupling

npj Quantum Materials

Article

Guoqiang Yu¹  Zedong Xu²  Delin Zhang²  Yong Jiang²  Ping Wang²  Yuhe Yang²  Zhiyan Jia²  Zheng Feng³  Quancheng Liu⁴  Yong Wu⁵  Xiaoguang Xu⁵ 

[1] Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences, 100190, Beijing, China;Institute of Quantum Materials and Devices, School of Electronic and Information Engineering; State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University, 300387, Tianjin, China;Microsystem & Terahertz Research Center, CAEP, 610200, Chengdu, China;School of Information Engineering, Southwest University of Science and Technology, 621010, Mianyang, China;School of Materials Science and Engineering, University of Science and Technology Beijing, 100083, Beijing, China;

关键词: ;   

DOI  :  10.1038/s41535-023-00559-6

 received in 2022-12-05, accepted in 2023-05-09,  发布年份 2023

来源: Springer

【 摘 要 】

The Orbital Hall effect, which originates from materials with weak spin-orbit coupling, has attracted considerable interest for spin-orbitronic applications. Here, we demonstrate the inverse effect of the orbital Hall effect and observe orbitronic terahertz emission in the Ti and Mn materials. Through spin-orbit transition in the ferromagnetic layer, the generated orbital current can be converted to charge current in the Ti and Mn layers via the inverse orbital Hall effect. Furthermore, the inserted W layer provides an additional conversion of the orbital-charge current in the Ti and Mn layers, significantly enhancing the orbitronic terahertz emission. Moreover, the orbitronic terahertz emission can be manipulated by cooperating with the inverse orbital Hall effect and the inverse spin Hall effect in the different sample configurations. Our results not only discover the physical mechanism of condensed matter physics but also pave the way for designing promising spin-orbitronic devices and terahertz emitters.

【 授权许可】

CC BY   
© The Author(s) 2023

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