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

Ruiqin Huang, Longbo Yang, Feng Yang, Yuttapoom Puttisong, Qingsong Hu, Guixian Li, Jingnan Hu, Zhaobo Hu, Liang Li, Jiang Tang, Weimin Chen, Yibo Han (), Jiajun Luo () and Feng Gao ()
Additional contact information
Ruiqin Huang: Huazhong University of Science and Technology
Longbo Yang: Huazhong University of Science and Technology
Feng Yang: Huazhong University of Science and Technology
Yuttapoom Puttisong: Linköping University
Qingsong Hu: Hubei University of Arts and Science
Guixian Li: Huazhong University of Science and Technology
Jingnan Hu: Huazhong University of Science and Technology
Zhaobo Hu: Jiangxi University of Science and Technology
Liang Li: Huazhong University of Science and Technology
Jiang Tang: Huazhong University of Science and Technology
Weimin Chen: Linköping University
Yibo Han: Huazhong University of Science and Technology
Jiajun Luo: Huazhong University of Science and Technology
Feng Gao: Linköping University

Nature Communications, 2025, vol. 16, issue 1, 1-8

Abstract: 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 an effective excitonic g-factor of −93.5 are observed from magneto-photoluminescence. More importantly, this nano-scale coupling can also be driven by an external electric field, which generates electroluminescence with a circular polarization of 44.5% at 4.2 K and 8% at 300 K. The spin-optic properties of this copper compound will stimulate the fabrication of next-generation spin-photonic devices based on self-trapped excitons.

Date: 2025
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-025-62704-y Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:16:y:2025:i:1:d:10.1038_s41467-025-62704-y

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-025-62704-y

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().