论文标题
抗铁磁体中的Néel自旋电流
Néel Spin Currents in Antiferromagnets
论文作者
论文摘要
已知铁磁铁支持自旋极化电流，这些电流控制着对旋转三位型有用的各种自旋依赖性转运现象。相反，预计完全补偿的抗铁磁铁仅支持全球自旋不中性电流。在这里，我们证明了这些全球自旋中性电流可以代表Néel自旋电流，即流经不同磁性旋转的交错旋转电流。 Néel自旋电流在具有强大的抗铁磁体中出现，具有强烈的群体内耦合（跳），并驱动诸如隧穿磁磁力（TMR）和自旋转移扭矩（STT）之类的自旋依赖性传输现象（AFMTJS）。使用ruo $ _ {2} $和fe $ _ {4} $ gete $ _ {2} $作为代表性的反铁磁铁，我们预测，具有强大交错的自旋极化的NéelSpinents可以在相关的AFMTJ中具有强大交错的自旋极化产生类似于Neelel Vector的确定性STT。我们的工作揭示了以前未开发的抗铁磁铁的潜力，并铺平了一条新的途径，以实现有效的抗铁磁性旋转旋转的信息。
Ferromagnets are known to support spin-polarized currents that control various spin-dependent transport phenomena useful for spintronics. On the contrary, fully compensated antiferromagnets are expected to support only globally spin-neutral currents. Here, we demonstrate that these globally spin-neutral currents can represent the Néel spin currents, i.e. staggered spin currents flowing through different magnetic sublattices. The Néel spin currents emerge in antiferromagnets with strong intra-sublattice coupling (hopping) and drive the spin-dependent transport phenomena such as tunneling magnetoresistance (TMR) and spin-transfer torque (STT) in antiferromagnetic tunnel junctions (AFMTJs). Using RuO$_{2}$ and Fe$_{4}$GeTe$_{2}$ as representative antiferromagnets, we predict that the Néel spin currents with a strong staggered spin-polarization produce a sizable field-like STT capable of the deterministic switching of the Néel vector in the associated AFMTJs. Our work uncovers the previously unexplored potential of fully compensated antiferromagnets and paves a new route to realize the efficient writing and reading of information for antiferromagnetic spintronics.
