摘要
Atomically thin two-dimensional(2D)magnetic materials offer unique opportunities to enhance interactions between electron spin,charge,and lattice,leading to novel physical properties at low-dimensional scales.While extensive research has explored how breaking three-fold(Cs)rotational symmetry in transition metal dichalcogenides(TMDC)can induce optical anisotropy at heterointerfaces,the role of magnetism in modulating these anisotropic optical properties remainsunderexplored.anHere,engineerwe antiferromagnet/semiconductor heterostructure by coupling isotropic MoWSe_(2) with the low-symmetric antiferromagnet NiPSs,introducing in-plane anisotropy in the MoWSe_(2) alloy.Low-temperature photoluminescence(PL)measurements reveal a pronounced linear polarization-dependent exciton emission intensity at the MoWSe_(2)/NiPS interface,with anisotropy ratios of 1.09 and 1.07 for charged and neutral excitons,respectively.Furthermore,applying an out-of-plane magnetic field results in a dramatic rotation of the exciton polarization direction by up to 90°at 9 T,significantly exceeding the previously reported maximum deflection of around 27°.This pronounced polarization rotation is not solely attributed to valley coherence,indicating a strong influence of the magnetic order in NiPS3.These findings provide new insights into the role of magnetic ordering in tuning optical anisotropy in 2D materials,paving the way for the development of advanced polarization-sensitive optoelectronic and magneto-optic devices.
基金
The authors gratefully acknowledge the essential support provided by the National Natural Science Foundation of China(No.52373311)
Additional significant contributions are made by the High-Performance Complex Manufacturing Key State Laboratory Project at Central South University(No.ZZYJKT2020-12)
the Key Project of the Natural Science Program of the Xinjiang Uygur Autonomous Region(No.2023D01D03)
Special thanks are extended to the Australian Research Council for its crucial role in advancing this research(ARC Discovery Project,DP180102976)
J.T.Wang also acknowledges support from the Strategic Priority Research Program of the Chinese Academy of Sciences(No.XDB33000000)
the National Natural Science Foundation of China(Nos.92263202 and 12374020)
the National Key Research and Development Program of China(No.2020YFA0711502)
This work is further supported by the Innovation Program for Quantum Science and Technology(No.2021ZD0301605).
