Liu Junfeng, Liu Danmin, Li Yachao, Song Haiying, Zheng Xinqi, Fan Changzeng, Liu Shibing
Beijing Key Lab of Microstructure and Property of Advanced Material, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing100124, P. R. China.
Strong-Field and Ultrafast Photonics Lab, Faculty of Materials and Manufacturing, Beijing University of Technology, Beijing100124, P. R. China.
Inorg Chem. 2022 Nov 21;61(46):18380-18389. doi: 10.1021/acs.inorgchem.2c02129. Epub 2022 Nov 8.
Studying ultrafast dynamics provides us with a way to modify materials from the timescale of particle interaction, and the related research on antiferromagnetic semiconductors is still inadequate. Based on the electron density reconstruction, we achieve the visualization of magnetic interactions of bulk antiferromagnetic MnPS in the ground state, reveal the role of two atomic site occupations of S atoms in different magnetic phase transitions, and provide the theoretical and experimental support for modifying magnetic properties by selectively replacing the S atom. The ultrafast carrier dynamics can provide information from the excited state to the ground state. Based on time-resolved transmittance measurements, ultrafast carrier dynamics of MnPS are reported. The phonon-assisted gap transition driven by the electronic structure is characterized. The coupling relationship among electrons, spin, and phonons is established. Furthermore, the spin orientations within different phases are confirmed.
研究超快动力学为我们提供了一种从粒子相互作用的时间尺度来改性材料的方法，而关于反铁磁半导体的相关研究仍不充分。基于电子密度重构，我们实现了块状反铁磁体MnPS在基态下磁相互作用的可视化，揭示了S原子的两种原子占位在不同磁相变中的作用，并为通过选择性取代S原子来改性磁性能提供了理论和实验支持。超快载流子动力学可以提供从激发态到基态的信息。基于时间分辨透射率测量，报道了MnPS的超快载流子动力学。表征了由电子结构驱动的声子辅助能隙跃迁。建立了电子、自旋和声子之间的耦合关系。此外，还确定了不同相内的自旋取向。
