整个布里渊区中SrIrO₃里的激光诱导瞬态磁振子
Laser-induced transient magnons in SrIrO throughout the Brillouin zone.
作者信息
Mazzone Daniel G, Meyers Derek, Cao Yue, Vale James G, Dashwood Cameron D, Shi Youguo, James Andrew J A, Robinson Neil J, Lin Jiaqi, Thampy Vivek, Tanaka Yoshikazu, Johnson Allan S, Miao Hu, Wang Ruitang, Assefa Tadesse A, Kim Jungho, Casa Diego, Mankowsky Roman, Zhu Diling, Alonso-Mori Roberto, Song Sanghoon, Yavas Hasan, Katayama Tetsuo, Yabashi Makina, Kubota Yuya, Owada Shigeki, Liu Jian, Yang Junji, Konik Robert M, Robinson Ian K, Hill John P, McMorrow Desmond F, Först Michael, Wall Simon, Liu Xuerong, Dean Mark P M
机构信息
Condensed Matter Physics and Materials Science Department, Brookhaven National Laboratory, Upton, NY 11973.
Laboratory for Neutron Scattering and Imaging, Paul Scherrer Institut, CH-5232 Villigen, Switzerland.
出版信息
Proc Natl Acad Sci U S A. 2021 Jun 1;118(22). doi: 10.1073/pnas.2103696118.
Although ultrafast manipulation of magnetism holds great promise for new physical phenomena and applications, targeting specific states is held back by our limited understanding of how magnetic correlations evolve on ultrafast timescales. Using ultrafast resonant inelastic X-ray scattering we demonstrate that femtosecond laser pulses can excite transient magnons at large wavevectors in gapped antiferromagnets and that they persist for several picoseconds, which is opposite to what is observed in nearly gapless magnets. Our work suggests that materials with isotropic magnetic interactions are preferred to achieve rapid manipulation of magnetism.
尽管磁性的超快操纵对于新的物理现象和应用具有巨大潜力，但由于我们对磁性关联在超快时间尺度上如何演化的理解有限，实现特定状态的目标受到了阻碍。利用超快共振非弹性X射线散射，我们证明飞秒激光脉冲可以在带隙反铁磁体中激发大波矢的瞬态磁振子，并且它们能持续几个皮秒，这与在近无隙磁体中观察到的情况相反。我们的工作表明，具有各向同性磁相互作用的材料更有利于实现磁性的快速操纵。
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