He, J., Zhang, S., Zheng, P., Fang, X., Sui, D., Yao, H., Ke, X., Ling, D., Sun, M., Huang, K., Ou, X. (2025). Mode-determined unidirectional phonon transducers for minimal frequency splitter. Nature Communications. https://doi.org/10.1038/s41467-025-66680-1