Shao and Luo have published one paper “Low Loss Al0.7Sc0.3N Thin Film Acoustic Delay lines” in IEEE EDL !
S. Shao, Z. Luo, Y. Lu, A. Mazzalai, C. Tosi and T. Wu, “Low Loss Al0.7Sc0.3N Thin Film Acoustic Delay lines,” in IEEE Electron Device Letters, vol. 43, no. 4, pp. 647-650, April 2022, doi: 10.1109/LED.2022.3152908.