Dr. Yi-Xuan Liu is an Assistant Research Fellow at the State Key Laboratory of New Ceramic Materials, School of Materials Science and Engineering, Tsinghua University. He received his Ph.D. from Tsinghua University in 2022, where his research focused on defect engineering in lead-free piezoelectric ceramics. From 2022 to 2023, he worked on lead-free piezoelectric thin films and MEMS devices at Tsinghua, during which he proposed the chemopiezoelectric effect in piezoelectric materials. From 2023 to 2025, he worked as a postdoctoral researcher under Prof. Judith L. MacManus-Driscoll FRS FREng at the University of Cambridge, focusing on ferroelectric properties of hafnia-based thin films. His research aimed to develop PFM-based polarization reconstruction techniques and enhance the fatigue resistance of epitaxial hafnia films through band structure engineering. In recent 5 years, Dr. Liu has published over 50 SCI-indexed papers, with 16 first/corresponding author articles in top journals, including Nature Materials, Nature Communications, Advanced Materials, and others, and holds granted national patents. His work has received over 1,600 citations and was recognized by the Wiley High Impact Author Award. He serves on the youth committee of the Micro/Nano Technology Branch of the Chinese Ceramic Society and has led multiple project fundings.