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Ultrafast optically induced spin transfer in ferromagnetic alloys.
Science Advances ( IF 13.6 ) Pub Date : 2020-01-17 , DOI: 10.1126/sciadv.aay8717
M Hofherr 1, 2 , S Häuser 1 , J K Dewhurst 3 , P Tengdin 4 , S Sakshath 1 , H T Nembach 4, 5 , S T Weber 1 , J M Shaw 5 , T J Silva 5 , H C Kapteyn 4 , M Cinchetti 6 , B Rethfeld 1 , M M Murnane 4 , D Steil 7 , B Stadtmüller 1, 2 , S Sharma 8 , M Aeschlimann 1 , S Mathias 7
Affiliation  

The vision of using light to manipulate electronic and spin excitations in materials on their fundamental time and length scales requires new approaches in experiment and theory to observe and understand these excitations. The ultimate speed limit for all-optical manipulation requires control schemes for which the electronic or magnetic subsystems of the materials are coherently manipulated on the time scale of the laser excitation pulse. In our work, we provide experimental evidence of such a direct, ultrafast, and coherent spin transfer between two magnetic subsystems of an alloy of Fe and Ni. Our experimental findings are fully supported by time-dependent density functional theory simulations and, hence, suggest the possibility of coherently controlling spin dynamics on subfemtosecond time scales, i.e., the birth of the research area of attomagnetism.

中文翻译:

铁磁合金中超快的光诱导自旋转移。

使用光来操纵材料中的基本时间和长度尺度上的电子和自旋激发的愿景要求在实验和理论上采用新方法来观察和理解这些激发。全光操纵的极限速度极限需要控制方案,在激光激励脉冲的时间尺度上,要对材料的电子或磁性子系统进行相干操纵。在我们的工作中,我们提供了铁和镍合金的两个磁性子系统之间这种直接,超快和相干自旋转移的实验证据。我们的实验结果得到了与时间相关的密度泛函理论模拟的完全支持,因此,提出了在飞秒级的时间尺度上一致地控制自旋动力学的可能性,即
更新日期:2020-01-17
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