Check out our group’s article in the 2019 Annual Review of Physical Chemistry covering our work on modeling conical intersections in semiconductor nanomaterials.

Check out Mike’s new paper in JPCA!  In it, we analyze the low propensity for nonradiative recombination in lead halide perovskites by identifying and characterizing conical intersections in two models of the surface of CsPbBr₃.  We only find conical intersections that are inaccessible upon excitation across the bulk band gap.  Analysis of the electronic structure around these intersections suggests that the ionic nature of the material contributes to the high energy of the intersections.

In Dmitry’s first paper in the group, he demonstrates that numerically exact solution of the vibrational Schrodinger equation in the adiabatic representation around a conical intersection in a finite basis is only possible if that basis contains discontinuous functions.  We demonstrate an approach based on a basis of discontinuous functions on a 2-D model and discussed how our approach could be extended to more dimensions.

Check out our recent collaborative effort with the Dantus group  and Ned Jackson at MSU and researchers at Kansas State University in Nature Communications.  In conjunction with experiment, Dantus group member Muath Nairat conducted GPU-accelerated AIMD simulations of an intriguing chemical reaction: the formation of H₃⁺ upon double ionization of small organic molecules in strong laser fields.  It is found that H₃⁺ forms when a roaming H₂ molecule abstracts a proton from the remaining molecular fragment. Our GPU-accelerated CASCI code enabled excellent sampling of trajectories on a potential energy surface that provided a balanced treatment of closed shell and radical reaction pathways.

Check out Wei-Tao’s new paper in Sci. Rep. in which we discuss the effect of Stokes shift on the efficiencies of translucent luminescence solar concentrators based on cyanine dyes.

Sadly, this work is dedicated to the memory of great friend and scientist Seth Olsen who passed away suddenly earlier this year.  Cyanine dyes were among our common interests, and I learned a lot about them from reading his papers and talking to him.  He is greatly missed.