Abstract: 

Topological states of matter research is one of the hot topics in the field of condensed matter physics. Due to their macroscopic properties, classical systems such as phononic crystals are considered excellent platforms for simulating topological physics. Scientifically, such research can lead to a comprehensive understanding of classical and quantum topological states of matter, and even advance the discovery of interesting topological physical effects and phenomena before their proposal in quantum systems. On the application side, this fundamental research can provide theoretical foundations and knowledge reserves for the development of high-performance novel acoustic devices. The speaker will introduce the research progress in the field of topological phononic crystals by our research group in recent years, including the acoustic realization of first-order and higher-order topological insulators, topological semimetals, universal construction schemes for topological bound states in the continuum, as well as the transport properties and applications of three-dimensional topological defect states.

Reporter Profile：

Chunyin Qiu is a professor at the School of Physics, Wuhan University. He obtained his bachelor's and master's degrees from Wuhan University in 2002 and 2005 respectively, and his Ph.D. degree from the Hong Kong University of Science and Technology in 2009. Currently, he is mainly engaged in research on topological properties in phononic crystals. He has published over 60 academic papers as the first or corresponding author, including 7 papers in prestigious journals such as Nature and its sub-journals, as well as 11 papers in Physical Review Letters (PRL). His related research has been widely recognized by international peers and has been highlighted in academic journals and news media such as Nature and Physics World. He has been selected as a highly cited researcher in China by Elsevier. He received the Outstanding Youth Fund of Hubei Province in 2017 and was selected as one of the "Top Ten Emerging Chinese Science and Technology Figures" in 2017. He was also selected as a young top-notch talent in the fourth batch of the National "Ten Thousand Talents Program".