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arXiv 1402.0881cond-mat.str-el
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Laser感应磁化曲线

Laser-induced magnetization curve

Shintaro Takayoshi, Masahiro Sato, Takashi Oka

摘要:

提出了一种利用圆偏振太赫兹激光实现量子磁体超快磁化的全光学方法。其关键思想是利用圆偏振激光及其啁啾。通过这种方法,即使在没有任何静态磁场的情况下,人们也可以得到一大类量子磁体的磁化强度随时间的变化曲线。我们在量子自旋模型中数值模拟了激光诱导的磁化过程,并找到了实现的条件。磁化的开始可以用Landau-Zener机制的多体版本来描述。在一个特定的模型中,我们表明,一个具有拓扑性质的平台状态可以动态实现。

英文摘要:

We propose an all optical ultrafast method to highly magnetize general quantum magnets using a circularly polarized terahertz laser. The key idea is to utilize a circularly polarized laser and its chirping. Through this method, one can obtain magnetization curves of a broad class of quantum magnets as a function of time even without any static magnetic field. We numerically demonstrate the laser-induced magnetization process in realistic quantum spin models and find a condition for the realization. The onset of magnetization can be described by a many-body version of Landau-Zener mechanism. In a particular model, we show that a plateau state with topological properties can be realized dynamically.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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