DOE OSTI · 2472558
Manipulating chiral spin transport with ferroelectric polarization
Abstract
A magnon is a collective excitation of the spin structure in a magnetic insulator and can transmit spin angular momentum with negligible dissipation. This quantum of a spin wave has always been manipulated through magnetic dipoles (that is, by breaking time-reversal symmetry). Here we report the experimental observation of chiral spin transport in multiferroic BiFeO 3 and its control by reversing the ferroelectric polarization (that is, by breaking spatial inversion symmetry). The ferroelectrically controlled magnons show up to 18% modulation at room temperature. The spin torque that the magnons in BiFeO 3 carry can be used to efficiently switch the magnetization of adjacent magnets, with a spin-torque efficiency comparable to the spin Hall effect in heavy metals. Utilizing such controllable magnon generation and transmission in BiFeO 3 , an all-oxide, energy-scalable logic is demonstrated composed of spin-orbit injection, detection and magnetoelectric control. In conclusion, our observations open a new chapter of multiferroic magnons and pave another path towards low-dissipation nanoelectronics.
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Huang, Xiaoxi, Chen, Xianzhe, Li, Yuhang, Mangeri, John, Zhang, Hongrui, Ramesh, Maya, Taghinejad, Hossein, Meisenheimer, Peter, Caretta, Lucas, Susarla, Sandhya, Jain, Rakshit, Klewe, Christoph, Wang, Tianye, Chen, Rui, Hsu, Cheng-Hsiang, Harris, Isaac, Husain, Sajid, Pan, Hao, Yin, Jia, Shafer, Padraic, Qiu, Ziqiang, Rodrigues, Davi R., Heinonen, Olle, Vasudevan, Dilip, Íñiguez, Jorge, Schlom, Darrell G., Salahuddin, Sayeef, Martin, Lane W., Analytis, James G., Ralph, Daniel C., Cheng, Ran, Yao, Zhi, Ramesh, Ramamoorthy. 2024-04-15. Manipulating chiral spin transport with ferroelectric polarization. https://doi.org/10.1038/s41563-024-01854-8
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