Spin-polarized self-trapped excitons in low-dimensional cesium copper halide.

ABSTRACT: Spin polarized excitons induced by spin injection from magnetic ion to a single quantum dot, has been considered as a basic unit of quantum information transfer between spin and photon for spin-photonic applications. However, this state-of-the-art technology has only been found with limited coupling strength and weak excitonic emission. Here, we demonstrate a spin-polarized self-trapped exciton naturally formed in the zero-dimensional lattice of cesium copper iodide. Upon excitation, the conversion from Cu⁺ ion to spin-1/2 Cu²⁺ ion results in an in-situ self-trapped exciton, which facilitates a local Jahn-Teller distortion and guarantees the strong spin-exciton coupling and near-unity excitonic emission efficiency. Consequently, a giant Zeeman splitting of -53 meV and

SUBMITTER: Huang R 

PROVIDER: S-EPMC12328795 | biostudies-literature | 2025 Aug

REPOSITORIES: biostudies-literature