近日，我们和ETH丁石磊博士、中山大学侯仰龙教授和北京大学杨金波教授等在二维反铁磁自旋电子学方向取得新进展。我们探究了CrPS4/重金属异质结体系中的自旋塞贝克效应（Spin Seebeck Effect）。研究发现在CrPS4和重金属Pt或Ta组成的异质结体系中，自旋塞贝克效应在自旋翻转场（spin-flip）附近表现出显著增强，且可通过温度和磁场调控。通过理论计算表明，该现象与自旋翻转场处的磁振子能隙闭合相关。这一发现为理解反铁磁体中的自旋动力学提供了新视角，为开发反铁磁磁振子器件提供了理论基础。

Recently, we have made new progress in the field of two-dimensional antiferromagnetic spintronics. We investigated the Spin Seebeck Effect in the CrPS4/heavy metal heterojunction system. The research found that in the heterojunction system composed of CrPS4 and heavy metals Pt or Ta, the Spin Seebeck Effect shows a significant enhancement near the spin-flip field, and it can be regulated by temperature and magnetic field. Theoretical calculations show that this phenomenon is related to the closure of the magnon energy gap at the spin-flip field. This discovery provides a new perspective for understanding spin dynamics in antiferromagnets and offers a theoretical basis for the development of antiferromagnetic magnonic devices.

图1 a.用于自旋塞贝克效应测试的CrPS4/Pt异质结霍尔器件示意图；b.不同温度下自旋塞贝克效应磁场依赖关系；c.CrPS4在c轴和ab面内的M-H曲线；d.自旋塞贝克效应得到的自旋翻转场和磁测量结果比较。

  相关成果已经发表于《自然·通讯》（Nature Communications16, 3037 (2025)），22级硕士研究生贺雪为论文第一作者。论文链接：https://www.nature.com/articles/s41467-025-58306-3