Carlos M.O. Bastos

Correlating Rashba Suppression with Exciton Binding in Low-Dimensional Metal Halide Perovskites

We used DFT-1/2+SOC band structures mapped to Wannier tight-binding Hamiltonians and solved with the Bethe−Salpeter equation to examine how confinement, polymorphism, and metal off-centering tune excitons in Pb- and Sn-iodide perovskites in 3D (MA(Pb or Sn)I$_3$), quasi-2D (BA$_2...