Phys.org October 15, 2024
By using semiconducting hybrid perovskite as an exploratory platform, a team of researchers in the US (Northern Illinois University, Argonne National Laboratory) discovered that Nd2+ doped CH3NH3PbI3 (MAPbI3) perovskite exhibited a Kondo-like exciton-spin interaction under cryogenic and photoexcitation conditions. From a mechanistic standpoint, such extended charge separation states are the consequence of the trap state enabled by the antiferromagnetic exchange interaction between the light-induced exciton and the localized 4 f spins of the Nd2+ in the proximity. Importantly, this Kondo-like exciton-spin interaction can be modulated leading to exciton recombination at the dynamics comparable to pristine MAPbI3… read more. Open Access TECHNICAL ARTICLE
Illustration showing exciton formation in a new semiconducting material used for quantum sensing. Credit: Ellen Weiss/Argonne National Laboratory.