论文标题
分解流体动力学制度中的宏伟的Wiedemann-Franz法律
Breaking down the magnonic Wiedemann-Franz law in the hydrodynamic regime
论文作者
论文摘要
最近的实验表明，超纯铁磁绝缘子中流体动力镁的行为。但是，它的直接观察仍然缺乏。在这里，我们得出了一组耦合的水动力方程，并研究了这种镁流体的热电导率和自旋电导率。我们揭示了宏伟的Wiedemann-Franz定律的剧烈分解，这是流体动力学制度的标志，这将成为实验实现新兴流体动力镁行为的关键证据。因此，我们的结果铺平了直接观察镁流体的道路。
Recent experiments have shown an indication of a hydrodynamic magnon behavior in ultrapure ferromagnetic insulators; however, its direct observation is still lacking. Here, we derive a set of coupled hydrodynamic equations and study the thermal and spin conductivities for such a magnon fluid. We reveal the drastic breakdown of the magnonic Wiedemann-Franz law as a hallmark of the hydrodynamics regime, which will become key evidence for the experimental realization of an emergent hydrodynamic magnon behavior. Therefore, our results pave the way towards the direct observation of magnon fluids.
