Publication date: 22nd July 2026
Chiral hybrid perovskites have emerged as a highly promising platform for exploring the interplay between spin, lattice, and optical degrees of freedom, owing to their intrinsically noncentrosymmetric crystal structures, strong spin-orbit coupling, and soft, dynamically responsive lattices. In these materials, chirality can give rise to unusual spin-selective optical responses and enhanced coupling between electronic and structural excitations, making them especially attractive for studying nonequilibrium phenomena in soft quantum materials. In this work, we investigate ultrafast spin and phonon transduction in chiral hybrid perovskites, with particular emphasis on how photoexcitation initiates coupled spin-lattice dynamics on femtosecond to picosecond timescales.
Using ultrafast spectroscopic techniques, we track the generation, evolution, and decay of coherent phonons following optical excitation, and examine how these lattice vibrations interact with spin-polarized electronic excitations. Our measurements reveal that photoexcitation does not simply perturb the electronic system in isolation, but instead drives a strongly coupled response in which vibrational and spin degrees of freedom evolve together. The observed dynamics provide evidence for efficient transduction between spin and phonon channels, likely mediated by the chiral crystal environment, spin-orbit interactions, and strong electron-phonon coupling inherent to the material system. These results suggest that lattice motion can serve as an effective conduit for manipulating spin information, opening a route toward dynamic control of spin states through structural degrees of freedom.
More broadly, these findings point to a new strategy for engineering ultrafast functionality in soft quantum materials, where chirality and lattice dynamics can be leveraged to control spin behavior on extremely short timescales. Such control may enable future advances in ultrafast spintronics, chiroptical switching, and hybrid optoelectronic devices that exploit the intimate coupling between light, spin, and lattice motion.
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