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

Ping Wang; Zheng Feng; Yuhe Yang; Delin Zhang; Quancheng Liu; Zedong Xu; Zhiyan Jia; Yong Wu; Guoqiang Yu; Xiaoguang Xu; Yong Jiang

doi:10.1038/s41535-023-00559-6

npj Quantum Materials (May 2023)

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

Ping Wang,
Zheng Feng,
Yuhe Yang,
Delin Zhang,
Quancheng Liu,
Zedong Xu,
Zhiyan Jia,
Yong Wu,
Guoqiang Yu,
Xiaoguang Xu,
Yong Jiang

Affiliations

Ping Wang: Institute of Quantum Materials and Devices, School of Electronic and Information Engineering; State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University
Zheng Feng: Microsystem & Terahertz Research Center, CAEP
Yuhe Yang: Institute of Quantum Materials and Devices, School of Electronic and Information Engineering; State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University
Delin Zhang: Institute of Quantum Materials and Devices, School of Electronic and Information Engineering; State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University
Quancheng Liu: School of Information Engineering, Southwest University of Science and Technology
Zedong Xu: Institute of Quantum Materials and Devices, School of Electronic and Information Engineering; State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University
Zhiyan Jia: Institute of Quantum Materials and Devices, School of Electronic and Information Engineering; State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University
Yong Wu: School of Materials Science and Engineering, University of Science and Technology Beijing
Guoqiang Yu: Beijing National Laboratory for Condensed Matter Physics, Institute of Physics, Chinese Academy of Sciences
Xiaoguang Xu: School of Materials Science and Engineering, University of Science and Technology Beijing
Yong Jiang: Institute of Quantum Materials and Devices, School of Electronic and Information Engineering; State Key Laboratory of Separation Membranes and Membrane Processes, Tiangong University

DOI: https://doi.org/10.1038/s41535-023-00559-6
Journal volume & issue: Vol. 8, no. 1
pp. 1 – 6

Abstract

Read online

Abstract 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.

Published in npj Quantum Materials

ISSN: 2397-4648 (Online)
Publisher: Nature Portfolio
Country of publisher: United Kingdom
LCC subjects: Technology: Electrical engineering. Electronics. Nuclear engineering: Materials of engineering and construction. Mechanics of materials; Science: Physics: Atomic physics. Constitution and properties of matter
Website: https://www.nature.com/npjquantmats/

About the journal