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斯基尔米的动力学和稳定性在一个维的异构性模式上
J C Bellizotti Souza1, N P Vizarim2, C J O Reichhardt3
1POSMAT-Programa de Pós-Graduação em Ciência e Tecnologia de Materiais, São Paulo State University (UNESP), School of Sciences, Bauru 17033-360, SP, Brazil.
概括
障碍会影响斯基尔米奥尼奥的动态. 增加的障碍会降低 skyrmionium 到 skyrmion 转换的临界电流,影响速度和稳定性. 横向动可以提高 skyrmionium 的寿命.
科学领域:
- 凝聚物质物理学 凝聚物质物理学
- 这就是Spintronics.
- 拓学物质是一个拓学物质.
背景情况:
- 斯基尔米奥尼,一个类似粒子的拓旋转纹理,表现出独特的动态.
- 了解在有障碍的情况下的 skyrmionium 行为对于 spintronic 设备应用至关重要.
研究的目的:
- 为了研究周期性异构性模式和灭障碍对 skyrmionium 运动的影响.
- 为了确定 skyrmionium-skyrmion转换和稳定性的关键电流密度和混乱密度.
主要方法:
- 模拟 skyrmionium 驾驶在具有不同缺陷密度的周期性异性质景观上.
- 分析不同电流驱动和横向震动对 skyrmionium 动态的影响.
主要成果:
- 在低缺陷密度下,skyrmionium表现出稳定的运动,在临界电流以上转变为skyrmion.
- 增加的混乱减少了转换的关键电流,并可以破坏移动的 skyrmionium 的稳定.
- 观察到一个重新进入效应,其中钉住的 skyrmionium 转变,恢复稳定,然后随着驱动的增加再次变得不稳定.
- 发现横向动可以通过减轻固定效应来延长移动的 skyrmionium 的寿命.
结论:
- 障碍在控制 skyrmionium 转换和稳定性方面发挥着重要作用.
- skyrmionium-skyrmion转换伴随着速度变化和 skyrmion Hall 角度的出现.
- 横向动提供了一种潜在的方法,可以在混乱的环境中提高移动 skyrmionium 的稳定性.
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