抗磁性体系中层次准粒子动力学由时-动量分辨X射线散射揭示
强关联电子
2026-02-16 v1
摘要
能量在耦合子系统之间流动是超快动力学和高速技术的关键。在磁性材料中，自旋涨落——磁矩——在超快磁性中调节这些流动。然而，对支配微观动力学的低能量磁矩实现动量分辨访问一直缺乏。我们利用时分辨共挨散射辅以互补时分辨X射线技术和量子动力学模拟，揭示了在光激励抗磁性材料CuO中耦合系统的层次能量路径。超过带内激发瞬间触发自旋无序，生成femtosecond尺度内全reciprocal space的non-thermal磁矩。在动量分辨跟踪中，picosecond尺度的磁矩准热化随后通过动量选择性磁矩-声子散射在nanosecond尺度恢复。准粒子色散失配创建恢复瓶颈，控制非平衡寿命。这一微观框架超越了现象学模型，并可推广到多种材料，确立了超快控制材料性质的设计原则。
引用
@article{arxiv.2602.13113,
title = {Hierarchical quasiparticle dynamics in antiferromagnets revealed by time- and momentum-resolved X-ray scattering},
author = {Arnau Romaguera and Elizabeth Skoropata and Yun Yen and Biaolong Liu and Abhishek Nag and Shih-Wen Huang and Ludmila Leroy and Katja Sophia Moos and Gian Parusa and Serhane Zerdane and Ritwika Mandal and Celine Mariette and Matteo Levantino and Eugenio Paris and Luc Patthey and Ekaterina Pomjakushina and Urs Staub and Monica Ciomaga Hatnean and Michael Schueler and Elia Razzoli and Hiroki Ueda},
journal= {arXiv preprint arXiv:2602.13113},
year = {2026}
}
备注
57 pages, 21 figures