Xiaoxi Huang, Xianzhe Chen, Yuhang Li, John Mangeri, Hongrui Zhang, Maya Ramesh, Hossein Taghinejad, Peter Meisenheimer, Lucas Caretta, Sandhya Susarla, Rakshit Jain, Christoph Klewe, Tianye Wang, Rui Chen, Cheng-Hsiang Hsu, Isaac Harris, Sajid Husain, Hao Pan, Jia Yin, Padraic Shafer, Ziqiang Qiu, Davi R Rodrigues, Olle Heinonen, Dilip Vasudevan, Jorge Íñiguez, Darrell G Schlom, Sayeef Salahuddin, Lane W Martin, James G Analytis, Daniel C Ralph, Ran Cheng, Zhi Yao, Ramamoorthy Ramesh
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 BiFeO3 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...
April 15, 2024: Nature Materials