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arXiv · 2506.06734

Polarized electroluminescence with magnetic spectral tuning in van der Waals magnet CrSBr

Yilei Wang·Shiqi Yang·Leyan Huang·Yuqia Ran·Pingfan Gu·Xinyue Huang·Kenji Watanabe·Takashi Taniguchi·Zuxin Chen·Yu Ye
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Abstract

Polarized wavelength-tunable electroluminescence (EL) represents a critical on-demand functionality for next-generation optoelectronics. While conventional van der Waals (vdW) EL devices offer discrete wavelength switching constrained by fixed emission states, we report a novel platform enabling continuous spectral tuning combined with intrinsically polarized emission. By leveraging exciton-assisted inelastic tunneling in the anisotropic magnet CrSBr, our devices achieve uniform EL with a near unity degree of linear polarization ($\approx$ 94.3$\%$). The strong magneto-electronic coupling in CrSBr facilitates continuous magnetic-field-controlled spectral tuning through spin canting-induced band renormalization. This work establishes vdW magnets as a versatile platform for developing reconfigurable polarized light sources with simultaneous spectral and polarization control.

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Yilei Wang, Shiqi Yang, Leyan Huang, Yuqia Ran, Pingfan Gu, Xinyue Huang, Kenji Watanabe, Takashi Taniguchi, Zuxin Chen, Yu Ye. 2025-06-07. Polarized electroluminescence with magnetic spectral tuning in van der Waals magnet CrSBr. https://arxiv.org/abs/2506.06734

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