What is a Topological Insulator?Dr Paolo MoligniniDr Paolo Molignini is a theoretical physicist working as a Postdoctoral Research Associate at the University of Cambridge. His current research interests are nonequilibrium physics (drivendissipative systems, Floquet engineering etc.), topological phases of matter, quantum optics and quantum simulation. He combines different theoretical techniques of manybody theory with numerical methods such as MCTDHX, tensor networks, and exact diagonalization, and has also started to embed machine learning into his research. 

Computational Physics: Understanding the Liion BatteryAngela HarperAngela Harper is a current PhD student in the Theory of Condensed Matter Group at the Univeristy of Cambridge working with Dr. Andrew Morris. Her current work focuses on using crystal structure prediction techniques to identify new battery materials for highercapacity Liion batteries. She hopes to identify materials which allow us to use rechargable batteries for gridscale storage, electrified transport, and in conjunction with renewable sources of energy. 

Photovoltaic and LED: Two faces of the same coinDr Denis TihonDr Denis Tihon received the M.Eng. and Ph.D. degrees in physical engineering from the Université catholique de Louvain (UCLouvain), LouvainlaNeuve, Belgium, in 2013 and 2018. During his Ph.D. he worked on the numerical modeling of periodic absorbers and partially coherent fields, in collaboration with the University of Cambridge. Between 2017 and 2019, he also worked on the simulation of magnetic resonance imaging (MRI) antennas in the context of MCube FETOPEN European Project. Since 2019, he is holding a postdoctoral position, under the M. SklodowskaCurie Fellowship, at the Cavendish Laboratory, Cambridge, where he is studying thermal and luminescent emitters. 

New Materials for Optoelectronic ApplicationsDr Amita UmmadisinguDr Amita Ummadisingu is a Swiss National Science Foundation Fellow at the Cavendish Laboratory. Her research interests are in sustainable energy technologies with focus on studying novel materials for optoelectronic applications which include solar cells, light emitting diodes (LEDs), photodetectors and lasers. She specializes in the formation of semiconductors from solutions for thin film devices. Her doctoral work at École polytechnique fédérale de Lausanne (EPFL) unravelled the formation of threedimensional perovskite materials for the fabrication of highly efficient solar cells. 