[磁学国家重点实验室学术报告] Electric control of magneto-optical Kerr Effect
||Prof. Alessandro Stroppa
CNR-SPIN, I-67100 L’Aquila, Italy
Hybrid organic-inorganic compounds attract a lot of interest for their flexible structures and multifunctional properties. For example, they can have coexisting magnetism and ferroelectricity whose possible coupling gives rise to magnetoelectricity. Here using first-principle computations, we shown that, in a perovskite metal-organic framework (MOF), the magnetic and electric orders are further coupled to optical excitations, leading to an electric tuning of the magneto-optical Kerr effect (EMOKE). Moreover, the Kerr angle can be switched by reversal of both ferroelectric and magnetic polarization only. The interplay between Kerr angle and the organic-inorganic components of MOFs offers surprising unprecedented tools for engineering MOKE in complex compounds. Note that this work may be relevant to acentric magnetic systems in general, e.g., multiferroics.
A. Stroppa et al., J. Am. Chem. Soc. 139, 12883 (2017).
Prof. A. Stroppa obtained his Master Degree in Physics from University of L'Aquila (Italy) in 2002 and PhD from University of Trieste (Italy) in 2006. He moved for a post-doc position in the University of Vienna in the group of Prof. G. Kresse. In 2008 he obtained a post-doc position in the Italian National Research Council (CNR). In 2012 he became permanent staff at CNR SPIN (SuPerconducting and other INnovative materials and devices institute). In 2013 he received the Italian National Scientific Qualification as associate professor in Theoretical Condensed Matter Physics and in 2017 as Full professor. He has been appointed as Visiting Research Scholar in the Department of Chemistry of North Carolina State University (Prof. M.-H. Whangbo). Recently he was honored as Shanghai Eastern Scholar Chair Professor and as High End Foreign Expert. His main expertise is density functional theory calculations of electronic, magnetic and structural properties of multifunctional materials, ranging from organic to inorganic and hybrid materials. He is author of about 90 articles, where of 7 as "Highly Cited in Field" (source Web of Science) with h-index=27.
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