Institute of Solid State Physics

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Understanding Collective Phenomena in Molecular and Hybrid Crystals from First Principles
Leeor Kronik
Weitzman Institute, Rehovot, Isreal
14:00 - 15:15 Monday 02 March 2020 PH 01 150

Molecular crystals are crystalline solids composed of molecules bound together by relatively weak intermolecular interactions, typically consisting of van der Waals interactions and/or hydrogen bonds. Hybrid crystals combine molecular units and covalent/ionic networks. Both classes of crystals play an important role in many areas of science and engineering, ranging from biology and medicine to mechanics, electronics, and photovoltaics. Therefore, much effort has been dedicated to understanding their structure and properties.
Here, I will focus on our recent progress in explaining and even predicting important classes of collective effects, i.e., phenomena that the individual units comprising the crystal do not exhibit, but arise through their interaction. Specifically, I will demonstrate these concepts by addressing unusual structure-function relations in biogenic and bio-inspired molecular crystals and unique dynamic phenomena in organic-inorganic halide perovskites. Throughout, I will highlight the insights gained from a successful interaction between theory and
experiment.