AI 中文总结
研究自旋霍尔棒连接负载电路的稳态，用基于最小功耗原理推广到双自旋通道模型的变分方法，得出当负载电阻与自旋弛豫长度距离足够大时焦耳耗散消失，揭示了纯自旋电流注入的显著特征。
AI 中文摘要
通过基于最小功耗原理推广到双自旋通道模型的变分方法，研究了连接到外部负载电路的自旋霍尔棒的稳态。推导了纵向和横向电流密度的自洽分布，以及电阻中相应的自旋和电荷积累与耗散功率。令人惊讶的是，当负载电阻与自旋弛豫长度相比放置在足够大的距离时，焦耳耗散消失。与更常见的电流注入相比，这种高度非平凡的全局稳态是纯自旋电流注入最显著的特征。
英文摘要
The stationary state of a spin Hall bar connected to an external load circuit is investigated through a variational approach based on the principle of minimum power dissipation generalized to the two-spin-channel model. The self-consistent distributions of longitudinal and transverse current densities, alongside the corresponding spin and charge accumulations and dissipation power in the resistance, are derived. Surprisingly, it is shown that the Joule dissipation vanishes when the load resistance is placed at a sufficiently large distance compared with the spin-relaxation length. Such a highly non-trivial global stationary state appears as the most striking characteristic of the injection of pure spin current compared with more usual current injection.
Comments27 pages, 10 figures
