报告题目：Chirality knob: from molecules to hybrid organic-inorganic metal halides

报告人：Alessandro Stroppa，CNR-SPIN Institute (Italy) 教授

报告时间：2023年12月20日 15:30

腾讯会议：853-608-757

报告地点：伟德BETVlCTOR1946中心校区唐敖庆楼B521报告厅

报告人简介

　　Alessandro Stroppa (July 14th 1976) is a Research Director of the CNR-SPIN Institute (Italy) and deputy director of the research unit in L’Aquila (Italy). He received his PhD in Theoretical Condensed Matter Physics from University of Trieste (Italy) in 2006, and he continued his research in computational materials science at University of Vienna in the group of Prof. Georg Kresse (VASP Team). After 2009, he joined the CNR in Italy where he became permanent staff in 2012. He is contract professor at University of L’Aquila (Italy), and invited professor at Shanghai and South East University (China).

　　His current research areas deal with solid-state physics and material science. Specifically, he is interested in 3D and 2D hybrid inorganic-organic perovskites, non-magnetic and magnetic 2D systems with special focus on photo-ferroic, multiferroic, magnetoelectric, twistronic, topological, magneto-optical and nonlinear optical properties, skyrmions, etc. He has great experience with Density Functional Theory (DFT) methods for the study of the structural, electronic and magnetic properties using all-electrons as well as pseudopotential approaches implemented in numerical codes. He has published about 138 peer-reviewed papers (h-index=43, Total citations 6744) in theoretical condensed matter also in collaboration with experimentalists. He is on the World’s top 2% scientists lists published by Stanford University since 2019.

报告摘要

　　Chirality is an important structural property: right-handed and left-handed chiral materials have identical chemical composition and connectivity, but they are related by mirror transformation, forming a couple of enantiomers. Chiralmaterials show unique features: the intrinsic non-centrosymmetry leads to optical rotation, circular dichroism (CD), second-harmonic generation (SHG), piezoelectricity, pyroelectricity, ferroelectricity, and topological quantum properties. In this talk, I will discuss the intriguing interplay between chirality and physical properties in innovative materials, ranging from molecules, twisted bilayers (non-magnetic as well magnetic) to chiral hybrid organic-inorganic perovskites. We will see that it is possible to “generate” and “tune” chirality in such a way that it can be view as a new “knob” for physical properties of the materials.

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