发表机构
RIKEN Center for Emergent Matter Science (CEMS)（理化学研究所涌现物质科学中心）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
本文提出电流驱动畴壁Thiele方程的等效电路表示，证明非绝热自旋转移力矩（β项）需有源元件（负耗散），与热力学矛盾，表明仅用β项解释实验不充分。
AI 中文摘要
我们提出了电流驱动畴壁的Thiele方程的等效电路表示。我们表明，非绝热自旋转移力矩（β项）不能仅由无源元件（如电阻、电感器和电容器）表示，并且必然需要对应于负耗散的有源元件。因此，假设驱动电流是纹理动力学的唯一功率源，直接纳入β项会引入与热力学原理的根本矛盾。该等效电路理论表明，仅通过β项对实验的解释并不能完全捕捉潜在的物理机制，强调需要考虑不同于自旋动力学的效应。
英文摘要
We present an equivalent circuit representation of the Thiele equation for the current-driven domain walls. We show that the non-adiabatic spin-transfer torque (β-term) cannot be represented by passive elements alone (such as resistors, inductors, and capacitors) and necessarily requires active elements, corresponding to negative dissipation. Consequently, assuming that the driving current is the only power source for the texture dynamics, directly incorporating the β-term introduces a fundamental contradiction with thermodynamic principles. This equivalent circuit theory indicates that the interpretation of experiments solely through the β-term does not fully capture the underlying physics, highlighting the need to account for effects distinct from the spin dynamics.
