Manipulation of anisotropic Zhang-Rice exciton in NiPS3 by magnetic field

Feilong Song, Yanpei Lv, Yu-Jia Sun, Simin Pang, Haonan Chang, Shan Guan, Jia-Min Lai, Xu-Jie Wang, Bang Wu, Chengyong Hu, Zhiliang Yuan and Jun Zhang ()
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Feilong Song: Chinese Academy of Sciences
Yanpei Lv: Chinese Academy of Sciences
Yu-Jia Sun: Chinese Academy of Sciences
Simin Pang: Chinese Academy of Sciences
Haonan Chang: Chinese Academy of Sciences
Shan Guan: Chinese Academy of Sciences
Jia-Min Lai: Chinese Academy of Sciences
Xu-Jie Wang: Beijing Academy of Quantum Information Science
Bang Wu: Beijing Academy of Quantum Information Science
Chengyong Hu: Beijing Academy of Quantum Information Science
Zhiliang Yuan: Beijing Academy of Quantum Information Science
Jun Zhang: Chinese Academy of Sciences

Nature Communications, 2024, vol. 15, issue 1, 1-8

Abstract: Abstract The effect of external magnetic fields on the behavior of the Zhang-Rice exciton in NiPS3, which captures the physics of spin-orbital entanglement in 2D XY-type antiferromagnets, remains unclear. This study presents systematic study of angle-resolved and polarization-resolved magneto-optical photoluminescence spectra of NiPS3 in the Voigt geometry. We observed highly anisotropic, non-linear Zeeman splitting and polarization rotation of the Zhang-Rice exciton, which depends on the direction and intensity of the magnetic field and can be attributed to the spin-orbital coupling and field-induced spin reorientation. Furthermore, above the critical magnetic field, we detected additional splitting of the exciton peaks, indicating the coexistence of various orientations of Néel vector. This study characterizes orbital change of Zhang-Rice exciton and field-induced spin-reorientation phase transitions in a 2D hexagonal XY-type antiferromagnet, and it further demonstrates the continuous manipulation of the spin and polarization of the Zhang-Rice exciton.

Date: 2024
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DOI: 10.1038/s41467-024-52220-w

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