Giant Magneto-Exciton Coupling in 2D van der Waals CrSBr
Source abstract
Abstract
Controlling magnetic order via external fields or heterostructures enables precise manipulation and tracking of spin and exciton information, facilitating the development of high-performance optical spin valves. However, the weak magneto-optical signals and instability of two-dimensional (2D) antiferromagnetic (AFM) materials have hindered comprehensive studies on the coupling between magnetic order and excitons in bulk-like systems. Here, we leverage magneto-optical spectroscopy to provide direct insight into the spin-flip and complex spin-canting behavior in thick-layered CrSBr under nonextreme temperature conditions (80 K). Theoretical calculations reveal that the strong coupling between excitons and magnetic order, especially the 32 meV exciton energy shift during magnetic transitions, stems from the hybridization of Cr and S orbitals and the larger exciton wave function radius of higher-energy B excitons. These findings offer a solid foundation for future exploration of 2D AFM materials in magneto-optical sensors and quantum communication using excitons as spin carriers.
Source: openalex_inverted_index · Quality: baseline
Research context
OpenAlex topics: 2D Materials and Applications · Perovskite Materials and Applications · Topological Materials and Phenomena
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Information Photonics Technology and School of Physics and Optoelectronics, Faculty of Science
Beijing University of Technology
State Key Laboratory of Low Dimensional Quantum Physics and Department of Physics
Tsinghua University
State Key Laboratory for Superlattices and Microstructures, Institute of Semiconductors
Chinese Academy of Sciences
Center of Materials Science and Optoelectronics Engineering
University of Chinese Academy of Sciences
CAS Key Laboratory of Standardization and Measurement for Nanotechnology, CAS Center for Excellence in Nanoscience
National Center for Nanoscience and Technology
Funding
National Key Research and Development Program of China · China Postdoctoral Science Foundation · Beijing Postdoctoral Science Foundation · National Science Fund for Distinguished Young Scholars · National Natural Science Foundation of China · Chinese Academy of Sciences
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