Growth of crystals and physics on the example of FeSb2

Cedomir Petrovic 

上海前瞻物质科学研究院

报告时间：2025年4月14日（周一）下午14:00

报告地点：紫金港校区段永平教学楼2号楼212报告厅

摘要：

Since the times of Bernd Matthias new materials synthesis and characterization has been pushing the boundaries of condensed matter physics. In my presentation I will briefly go over some basic principles of flux method crystal growth and then will focus on the Kondo semiconductor – like physics on the example of iron diantimonide, a correlated electron semiconductor that was found to host colossal thermopower, among the highest in nature. Its mechanism is presently not understood and moreover there is a wide variety in its reported values. In my talk I will show how atomic defects create in-gap states of Fe orbital character that carry high electronic diffusion thermopower whereas phonon drag acting on such states – when crystal is engineered to have high phonon mean free path – enhances thermopower to colossal values. This paves the way for predictive design of new materials such as CoSbS or FeP₂.

报告人简介：

After receiving his PhD degree from Florida State University in 2000, Dr. Petrovic conducted his postdoctoral research in Ames Laboratory and Iowa State University from 2000 to 2002.  He then worked as a staff scientist (Assistant Physicist, Associate Physicist, and tenured Physicist) in Brookhaven National Laboratory (BNL) since 2002, and served as an Adjunct Professor in Johns Hpkins University from 2007 to 2024, and in Stony Brook University since 2010, until he moved to Shanghai Advanced Research in Physical Sciences in 2023. Dr. Petrovic was awarded APS Fellow in 2016 and BNL Science and Technology Award in 2022. Dr. Petrovic discovered CeCoIn₅ at NHMFL Tallahassee, and his current research group is mainly focus on materials synthesis, crystal growth and characterization aimed towards rapid discovery and selection of important materials in condensed matter physics and their properties of interest. This is at the core of physical science that stems from electronic correlations but also fosters multitude of applied research areas associated with it.