Modeling Epitaxial Growth: From Atomistic Motion to Macroscopic Laws

Series/Event Type: 

Epitaxial growth has been studied extensively, both experimentally and theoretically, as a subject of technological importance and scientific interest. In this talk, I will discuss recent progress and open challenges in understanding some fundamental aspects of epitaxial growth.  In particular, I will address the following question: How are models of homoepitaxial growth or relaxation connected across different length and time scales? The models include: (i) atomistic master equations; (ii) nanoscale motion laws for line defects (steps); and (iii) fully continuum laws for the surface height. In this context, surface phenomena of crystals may exhibit an effective behavior dominated by microscale events. I will discuss these issues via selected examples.

Dionisios Margetis, University of Maryland
Bowen Hall
Friday, February 21, 2020 - 12:30pm

Speaker Bio

Dr. Dionisios Margetis is a Professor of Mathematics and the Institute for Physical Science and Technology at the University of Maryland, College Park. After receiving the Electrical Engineering Diploma from the National Technical University of Athens, he went on to Harvard for a PhD in Applied Physics. Then, he carried out postdoctoral work at Harvard and M.I.T.. He joined the faculty at the University of Maryland in 2006. He has been a full Professor since 2012. He was a recipient of: an NSF Career Award; two Research and Scholarship Awards, and Dean's Award for Excellence in Teaching at Maryland; and Dean's Prize for Excellence in Graduate Education by M.I.T. He was elected as an Ordway Distinguished Lecturer and Visitor at the University of Minnesota for 2019-20. His research focuses on epitaxial growth, plasmonics, and quantum dynamics.