范德华反铁磁体CrCl$_3$中的超流体自旋输运
Superfluid Spin Transport in the Van der Waals Antiferromagnet CrCl$_3$
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中文总结 AI 辅助
该研究在范德华反铁磁绝缘体CrCl$_3$中发现并调控了超流体自旋输运，通过非局域器件实现约90微米弱衰减输运，并证明强磁场和高温可抑制该状态，为低功耗长距离自旋输运提供新平台。
中文摘要 AI 辅助
在过去十年中，对自旋超流性的探索已走向自旋电子学的前沿，其驱动力源于相位梯度驱动的超低损耗自旋输运的前景。然而，实验研究仍然有限，主要原因是缺乏合适的材料体系。在此，我们报道了通过非局域器件结构在易平面范德华反铁磁（AFM）绝缘体CrCl$_3$中发现并调控超流体自旋输运。结合非局域磁振子输运测量与理论建模，我们证明了自旋超流性在倾斜反铁磁自旋构型下的CrCl$_3$中涌现，并产生超长距离（约90微米）、弱衰减的自旋输运。我们还提供了直接证据表明，强磁场和升高的温度会抑制超流体态，恢复非相干磁振子随距离的快速指数衰减。这些发现凸显了自旋超流性在二维磁性绝缘体中的潜力，并将CrCl$_3$确立为下一代自旋电子学应用中节能、长距离自旋输运的有前景平台。
英文摘要
Over the past decade, the quest for spin superfluidity has moved to the forefront of spintronics, driven by the promise of phase-gradient-driven, ultra-low-loss spin transport. However, experimental investigations remain limited, primarily due to the lack of suitable material systems. Here, we report on the discovery and control of a superfluid spin transport in the easy-plane van der Waals antiferromagnetic (AFM) insulator CrCl$_3$ by a nonlocal device structure. Combining nonlocal magnon transport measurements with theoretical modelling, we demonstrate that spin superfluidity emerges in CrCl$_3$ under canted AFM spin configurations, where it gives rise to ultra-long range (around 90 $μ$m), weakly decaying spin transport. We also provide direct evidence that strong magnetic fields and elevated temperatures suppress the superfluid state, restoring the rapid exponential decay with distance of incoherent magnons. These findings underscore the potential of spin superfluidity in two-dimensional magnetic insulators and establish CrCl$_3$ as a promising platform for energy-efficient, long-distance spin transport in next-generation spintronic applications.
发表机构
- CIC nanoGUNE BRTA（纳米技术研究中心）
- State Key Laboratory of Flexible Electronics (LoFE) & Institute of Flexible Electronics (IFE), Xiamen University（厦门大学）
- Department of Physics, Boston College（波士顿学院）
- IKERBASQUE, Basque Foundation for Science（巴斯克科学基金会）
机构由 AI 辅助整理，请以论文原文为准。
