The research field of oxide heteroepitaxy suffers from the characteristics of misfit strain and substrate clamping, hampering the optimization of performance and the gain of fundamental understanding of oxide systems. Recently, there are demonstrations on functional oxides epitaxially fabricated on layered muscovite substrate. In these heterostructures, due to the weak interaction between substrate and film, they show the lattice of films close to bulk with excellent strictive properties, suggesting that these critical problems can be potentially solved by van der Waals oxide heteroepitaxy. In addition, by exploiting the transparent and flexible features of muscovite, such a heteroepitaxy can deliver new material solutions to transparent soft technology. In this talk, the history, development, and current status of van der Waals oxide heteroepitaxy are addressed and discussed. Besides, new research directions in terms of fundamental study and practical application are proposed to highlight the importance of this research field.
Professor Ying-Hao Chu received his PhD in the Department of Materials Science & Engineering from National Tsing-Hua University in 2004. Then, he joined University of California, Berkeley as a postdoc. In 2008, he acquired an Assistant Professorship in the Department of Materials Science & Engineering at National Chiao Tung University. In 2013, he started an adjunct position in institute of Physics, Academia Sinica. In 2014, he held an adjunct position in the Department of Electrophysics, National Chiao Tung University. In 2016, he started the adjunct positions in the Material and Chemical Research Laboratories, Industrial Technology Research Institute and the International College of Semiconductor Technology at National Chiao Tung University. His research is highly focused on complex functional oxides and strongly correlated electron systems. He has extensive experience in the use of advanced characterization techniques to understand and manipulate functional oxide heterostructures, nanostructures, and interfaces. His current goal is try to create a pathway to use high quality oxide heteroepitaxy for soft technology. Now, he is a pioneer with the most publication along this research direction. He has published more than 235 papers (>12000 citations, h-index=52 Web of Science, >16000 citations, h-index=59 Google Scholar) in academic journals, including Science series (2), Nature series (>20), PNAS (2), ACS Nano & Nano Letters (>20), Advanced (Energy or Functional) Materials (>20), Physical Review series (>25), Applied Physics Letters (~40). In 2014 and 2016, he has been placed in the list of Highly Cited Researchers in Materials Science (Thomson Reuters). He is the winner of Y. Z. Hsu scientific paper award in Nanotechnology, young researcher award of Taiwan vacuum society and young researcher award of materials research society Taiwan.
1. Complex oxide heterostructures, nanostructures, and interfaces for next-generation devices
2. Fabrication and characterization of oxide mesocrystals
3. Exploration of topological defects in strongly correlated electron systems
4. New material solutions to renewable energy
5 Flexible and transparent oxide electronics --- Micatronics