Enhancing Hot-Carrier Lifetime through Spin Splitting and Strain Interaction in Chiral Perovskite Materials
Phys. Rev. Lett. 136, 256902 – Published 25 June, 2026
DOI: https://doi.org/10.1103/9tfy-gp2t
Abstract
The dynamical control over electronic properties represents a key area of research in condensed-matter physics. Here, we demonstrate all-optical control of carrier-strain-mediated giant enhancement of spin splitting (100 meV) in a chiral 2D perovskite. Ultrafast circular dichroism measurements and ab initio calculations reveal that anisotropic strain from confined photoexcited excitons enhances spin splitting, thereby creating a spin-dependent hot-carrier relaxation pathway and tripling hot-carrier lifetimes. Our findings establish a versatile optical strategy for coherent spin manipulation and open avenues for developing spin-based hot-carrier devices.
