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Enhancing Hot-Carrier Lifetime through Spin Splitting and Strain Interaction in Chiral Perovskite Materials
Yuling Huang1, Xiao-Feng Luo2,3, Shaokuan Gong1
1Southern University of Science and Technology, State Key Laboratory of Quantum Functional Materials, SUSTech Energy Institute for Carbon Neutrality, Department of Mechanical and Energy Engineering, Shenzhen 518055, People's Republic of China.
None:
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.
