由延迟弛豫产生的共振自旋模式
Resonant spin mode from retarded relaxation
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中文总结 AI 辅助
针对超快自旋动力学中太赫兹额外模式，提出用延迟林德布拉德弛豫解释，简单唯象模型可描述共振位置、宽度及等距峰特征。
中文摘要 AI 辅助
在超快自旋动力学中，太赫兹范围内会出现额外的模式，这些模式无法用传统的朗道-利夫希茨方程描述。通过引入更高阶时间导数来扩展这些方程（惯性朗道-利夫希茨-吉尔伯特方程）只能部分解决问题。在此，我们建议用延迟的林德布拉德弛豫来解释这些模式。尽管这种唯象方法十分简单，但与实验数据的吻合令人鼓舞：物理上合理的参数描述了这些共振的位置和较大宽度。多个近似等距共振峰这一显著特征也与实验证据相符。
英文摘要
In ultrafast spin dynamics additional modes in the THz range appear which cannot be captured by conventional Landau-Lifshitz equations. Extending these equations by further time derivatives (inertial Landau-Lifshitz-Gilbert equation) solves the issue only partly. Here we suggest to explain these modes by retarded Lindbladian relaxation. In spite of the simplicity of this phenomenological approach the agreement with the experimental data is promising: physically plausible parameters describe the position and the large width of these resonances. The salient feature of several almost equidistant resonance peaks is in-line with experimental evidence as well.
发表机构
- TU Dortmund University（多特蒙德工业大学）
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