ABSTRACT
For a group of substances with different chemistry but share similar anomalous properties (e.g., density anomaly, diffusivity anomaly), the existence of a liquid-liquid critical point as well as liquid-liquid phase transition is assumed to be the key. However, the experimental confirmation remains challenging since the hypothesized critical point and phase transition are located in the phase region below the homogeneous crystallization line which is difficulty for experiment to detect directly. In this talk, I will discuss our recent studies on the liquid-liquid phase transitions from supercritical region. Our results shows that the structure change reflected in the potential energy surface is directly connected to the change in dynamic properties, which is important for the investigation of glass transition at low temperature and thus can also be employed to investigate the liquid-liquid transition occurring at in supercritical phase region.
BIOGRAPHY
Prof Limei Xu received her Ph.D. from the Department of Physics at Boston University in 2007. After a postdoc in Chemistry Department at University of Utah, she joined the Advanced Institute of Materials Research (WPI-AIMR) at Tohoku University as an assistant professor (2008-2011). In 2011, she joined the International Center for Quantum Materials (ICOM) at Peking University as tenure-track associate professor, and then was promoted to tenured professor in 2015. Her research interests include phase transition and critical phenomena, liquid water in low-dimensions, and nonequilibrium statistical physics.
Date & Time
Venue
Chair