在2D反铁磁半导体FePSe3中具有强大和相互的磁声声波效应
Yue Sun1, Bo Liu1, Chee Kwan Gan2
1School of Physics and Technology, Wuhan University, Wuhan 430072, China. liu.sheng@whu.edu.cn.
Nanoscale
|March 17, 2025
概括
研究人员在2D反铁磁FePSe3中探索了磁声合. 他们发现,激光功率和磁场可以控制自旋网相互作用和声能量,揭示了新的自旋声现象.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 材料科学 材料科学 材料科学
- 量子磁力 量子磁力 量子磁力
背景情况:
- 磁 - 声联合和旋 - 声相互作用对于通过磁力操纵声至关重要.
- 二维 (2D) 磁体系统表现出无极性磁体秩序和带有旋转角动量的磁子.
- 最近的研究表明,磁声互动可以转移角动量.
研究的目的:
- 为了研究2D反铁磁材料FePSe3中的磁声声合.
- 通过外部刺激探索通过外部刺激控制自旋网相互作用和声子能量.
- 揭示反铁磁系统中的新型自旋电声现象.
主要方法:
- 利用拉曼光谱分析低频和高频光谱特征.
- 研究激发激光功率对磁声声合的作用.
- 应用了外平面磁场来研究其对声子和拉曼散射的影响.
主要成果:
- 通过调整激光功率,在没有外部磁场的FePSe3中观察和控制磁声声合.
- 确定了低频雷曼光谱特征低于尼尔温度的额外低频雷曼光谱特征,表明受控制的旋转格子相互作用.
- 证明一个外平面磁场可以控制声子,并诱导Raman散射旋转的Ag模式.
结论:
- 该研究提供了一种局部加热的方法,以调节2D反铁磁体中与磁子相结合的声子.
- 揭示了FePSe3中可控制的自旋声波现象,突出了通过磁相互作用操纵格子振动的潜力.
- 这些发现有助于理解低维磁材料中基本的自旋 - 声子相互作用.
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