Spin-induced linear polarization of photoluminescence in antiferromagnetic van der Waals crystals
Spin-induced linear polarization of photoluminescence in antiferromagnetic van der Waals crystals
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DOI：
10.1038/s41563-021-00968-7
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发表时间：
2020-06
期刊：
影响因子：
41.2
通讯作者：
Xingzhi Wang;Jun Cao;Zhengguang Lu;A. Cohen;Hikari Kitadai;Tianshu Li;Qishuo Tan;Matthew Wilson;C. Lui;D. Smirnov;S. Sharifzadeh;X. Ling
中科院分区：
文献类型：
--
作者：
Xingzhi Wang;Jun Cao;Zhengguang Lu;A. Cohen;Hikari Kitadai;Tianshu Li;Qishuo Tan;Matthew Wilson;C. Lui;D. Smirnov;S. Sharifzadeh;X. Ling
反铁磁物质因其固有性质（包括太赫兹共振、多能级状态和无杂散场）而在自旋电子学中显示出巨大的潜力。货车瓦反铁磁体结合其层状结构的性质，有望为二维自旋电子学提供新的见解和新的设计。vdW反铁磁体的零净磁矩增强了自旋稳定性，但阻碍了自旋与激子等其他激发元素之间的关联。这种耦合是迫切期待的基础磁光研究和潜在的光自旋电子器件。在这里，我们报告了一个超尖锐的激子发射具有良好的单色性在反铁磁镍磷三硫化物（NiPS3）从散装原子薄片。我们证明了激子发光的线偏振垂直于NiPS3中有序的自旋取向。通过施加面内磁场来改变自旋取向，我们进一步操纵激子发射极化。激子与自旋之间的这种强相关性为二维材料的磁光研究提供了新的见解，从而为开发光自旋电子器件和基于反铁磁的量子信息技术开辟了道路。
Antiferromagnets display enormous potential in spintronics owing to its intrinsic nature, including terahertz resonance, multilevel states, and absence of stray fields. Combining with the layered nature, van der Waals (vdW) antiferromagnets hold the promise in providing new insights and new designs in two-dimensional (2D) spintronics. The zero net magnetic moments of vdW antiferromagnets strengthens the spin stability, however, impedes the correlation between spin and other excitation elements, like excitons. Such coupling is urgently anticipated for fundamental magneto-optical studies and potential opto-spintronic devices. Here, we report an ultra-sharp excitonic emission with excellent monochromaticity in antiferromagnetic nickel phosphorus trisulfides (NiPS3) from bulk to atomically thin flakes. We prove that the linear polarization of the excitonic luminescence is perpendicular to the ordered spin orientation in NiPS3. By applying an in-plane magnetic field to alter the spin orientation, we further manipulate the excitonic emission polarization. Such strong correlation between exciton and spins provides new insights for the study of magneto-optics in 2D materials, and hence opens a path for developing opto-spintronic devices and antiferromagnet-based quantum information technologies.